Engineering Economics 820 UCB Extension AC Porter

Page 1

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Ec (J'-' (J,,-, I ~ S" C A.*'Iss ~. t. PORT£t,*_


LIFELONG LEARNING

SECOND-CLASS POSTAGE

University Extension

Paid at Berkeley, Cal iforn ia

University of California

Berkeley 4, California

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ROUTING SLIP

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NOTE: If authority for selecting individuals for this program is delegated to someone else, please use this routing slip to forward this copy.

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last Named: For your review and consideration.


ENGINEERING

Electronic Data Processing, California Packing Corporation, San M a h an, E arI G " Jr B S 0, Francisco Maxwell, Doran J., Chief Building Inspector, City of Newark D'd E, Chief Structural Engineer, Frank E. McClure, · aVI L ., B.S.C. . k A Oakland .. Messmger, Milne, Robert M., M.B.A., Controller and Assistant Treasurer, Alaska Pac ers ssoctatwn, San Frandsco Nejedly, John A., LL.B., District Attorney, Contra Costa County, Martinez Pappas, Theodore P., M.B.A., Electronic Data Processing, California Packing Corporation, San Francisco Porter Albert C., B.S., Associate Transportation Engineer, California Public Utilities Co~mission, San Francisco Puishes, Alfons, LL.B., Patent Attorney, San Francisco .' . . Rogers, Howard E., A.B., Technical Editor, University of CaZtforma Lawrence RadwtlOn Laboratory, Berkeley . . H ans L u d WI, 'g M • S ., Research Engineer' California Research CorporatIOn, Stemmetz, 'J

Richmond I . M h' Systems Engineer, Internationa BUSiness ac mes A Advisr>rfl ~." Stevenson, Ch ar Ies W ., M .., Corporation, Oakland .' I Symonds, Malcolm F., M.S., Senior Structures Engineer, Htller Atrcraft Company, Pa 0 AdldtoJ

To

. M A Editor Publications Department, Lockheed Missiles and Space Com-

,arvIS,

..,

,

pany, Palo Alto .

Watt, John, Chief Assistant Building Inspector, Ctty of San Mateo

Statics XB 3S

Mechanics of Celestial Bodies X 410

.

Force Systems and equilibrium condit,ions With emphasis on engineering problems coverIng ,st~uC­ tures machines, distributed for~es. and . frlctlo Includes graphical and algebrlnC s~lutlOns an an introduction to the method of Virtual wor~ . Prerequisite: General Ph~sics 4A, AnalytiC Geometry and CalculUB, Third Course XB 4A, and Fourth Course XB 4B (XB 4B may be taken co ncurrentlv) or Calculus and Advanced Calcu' Ius. 14A-14B (14B may be taken. co ncurren tly). Engineering Graphics 25 or equivalent courses and consent of teacher. 3 units BERKELEY Mr. Howe Tues. F el). 5; 7-9 :30 p.m ; 116 Dwinelle Hall; 18 meetings; $40 (CI1\sS meets on Feb. 12).

d

Properties of Materials XB 45

.

An introductory course on the prope:tles .of engineering materials. Applications of ba ~lc p~m ­ ciples to the selection and use of engmeerlng

ma~r:all:boratory

part of this course is design.ed

to show the fundamental nature of the prol?ert.es

of materials. The seven laboratory e~perlments and much of the equipment were ~~ec lflcally de· signed for th is course. Pre.requlslte: Genera) Chemistry, Qualitetive AnalYSIS IB and General Physics 4B (may be taken concurrently) or equivalent experience and consent of teacher. 3 units BERKELEY Mr. Pirtz Tues. and ThUTS. Feb. 5; 7- 9 :3~ p.m. ; 390 Hearst Mining Building; 23 meetmgs ; $50.

A cODlprehensive presentation of ~ewton 's Laws of Motion' gravitational attraction; mo' tions of planets a~d satellites .of the solar sy.stem; perturbations of orbits; artifiCial earth satellltes­ effect of proximity of the earth, mecha!,lCs of space travel. Prerequisite: General PhYSICS 4A. 4B . 4C, and Mathematics 4A or eqUivalent, or consent of teacher.

3 units

ATHERTON Mr. Cooper

Tues. F eb. 19; 7-10 p .m ; room {}-S, Menlo·

Atherton High School; 15 meetlllgs; $50.

Corrosion X 416

An introductory cours~ on ~auses and P!e­ vention of corrosion. ~laOlfest8tlOns of .corroslve attack, fundamental ca~ses of. corrOS ion, cor­ rosion rates and fac.tors mflU,encmg rates, ~lectro­ chemistry of corrosion re~ctlOns;, m~chanlsms of different types of corr,oslOn. PrIncI,ples of cor­ l'osion testing. Prevenhon of corrosIOn. by selec­ tion of resistant construction m~terIals, l?ro­ tective coatings, inhibitors, c~\hodlc protectIOn, control of env ironmen tal conditIOns.

2 units

REDWOOD CITY Mr. Duffek Mon. Feb . 11; 7 :30-9 :30. p.m.; room 27, Sequoia High School; 15 meetmgs; $37.

Engineering Systems Theory X 4S0 See Electrical Engineering

Mechanical Drawing 800

Lettering, use of instruments, ge0!'letTic~1 c,!n­ structions. freehand technical sketchmg, pictorial

NORTHERN AREA drawing (isometric and oblique), orthographic views (instrumental and freehand), sections and conven tions, threads and fasteners, dimensioning, working drawings (details and assemblies). BERKELEY Mr. Harris Mon. Feb. 11; 7-9 p .m .; room 114 Building T·S·; 15 meetings; $30.

Administration of the Engineering Function 802 Planning and scheduling of engineering, pro' curement, and construction, The planning fun c· tion will be studied from project inception through contracts, budgets, schedules, fore casts, and reo ports; sequence requirements, manpower, time r equirements. and work load. The graphic ap­ proach will be stressed. Uses and limitations of statistics; preliminary reports, progress reports, stud ies for dev eloping criteria . Planning prob· lems submitted by the class will be discussed using actual working forms, schedules, and methods to illustrate the planning function. REDWOOD CITY Mr. Low Tues. Feb. 26; 7 :30-9 :30 J?m.; room 110 Sequoia High School; S meetmgs; $21 .

Applications of Engineering Economics 820 Practical applications of economic procedures t o engineering problems. Interest and interest fonnulas; annuities and si nking fund s; de­ preciation, va luation, and rate base ; capital re­ covery ~\'ith a return on investment; present worth and capitalized cost; economic studies for a proposed enterprise; accounting in relation to replacement. Of special interest to engineers pre' paring for examinations or for supervisory posi· tions or private practice. SAN FRANCISCO Mr. Port.r Mon. Feb. 11; 6- 9 p.m.; 207 Richardson Hall; 10 meetings; $30.

Mechanics and Strength of Materials 828A An elementary course stressing fundamental principles of statics, properties of materials, and strength of materials. Topics will include: forces and moments, resuJtants and equiHbrium of force systems; centroids and centers of gravity; moments of inertia of area; stresses: tension, compression, shear. and bending. Relation of these principles to beams, columns, and pressnre vessels. BERKELEY: Section I Mr. Messinger Mon. Feb. 11; 7-9 p.m . ; 212 Engineering Building; 15 meetings; $35. SACRAMENTO: Section 2 Mr . Crane, Mr. Eskel Thurs. Feb. 7; 7-9 p .m.; room B·6 Encina High S chool; 15 meetings; $35.

Mechanics and Strength of Materials 828A An elementary course stressing fundamental principles of statics, properties of materials, and strength of materials, Forces and moments; re· sultants and equ.i librium of coplanar force sys· terns; two force members ; truss analysis; three force members; non·coplanar for ce systems; centroids and centers of gravity; moments of inertia of area; properties of engineering rna· terials: simple s tresses-tension, compression, and shear; pressure vessels; beam theory-shear and bending moment, shear stresses and bending stresses; beam deflections; statically indetenni· nate beams; torsion; column theory; combined stresses; riveted, welded, and bolted joints. Pre·

15 requisite: Plane Trigonometry XB C or equiva' lent high school course, and consent of teacher. PALO ALTO: Section 3 Mr. Symonds ~ron. Feb. 11; 7-9 :30 p .m .; room 25, Wilbur Junior High School; 12 meetings; $35.

Mechanics and Strength of Materials 828B Second of two courses. Review of statics and strength of materials. Practical applications of these principles to engineering deSign of beams, columna, tension and compression members, simple connections, frames and trusses as ex­ emplified in simple structures of timber, steel and reinforced concrete, Prerequisite: Mechanics and Strength of Materials S2SA or equivalent experience and consent of teacher, BERK-ELEY Mr. Chinn Mon. Feb. 11 ; 7-9 p .m.; 116 Engineering Building ; 15 meetings; $37.

Electronic Data Processing: Programming a Business Computer 833 . Theory and practice in programming business applications for an electronic computer system. ourse includes computer components, survey of Rvai lable equipment, programming instruction, progranuning practice using business problems­ payroll, inventory, etc.; examples of electronic computers operating on business applications in various industries. Advance enrollment is advised so that admission to the class will be assured . Class limited . BERKELEY: Section I Mr. Mahan Tues. Feb. 19 ; 7-9 : 30 p .m . 212 Engineering Build ing; 16 meetings; $37. SAN FRANCISCO: Section 2 Mr. CIawford Tues. Feb. 19; 6:30-9 p.m.; 112 Richardson Hall; 16 meetings; $37. SAN FRANCISCO: Section 3 Mr. Pappas Wed . Feb. 6; 6 :30-9 p .m.; 112 Richardson Hall; 16 meetings; $37.

Electronic Data Processlngl Systems Aspects and Applications 834 Problems, possibilities, and limitetions of applying computer systems to business functions. A theoretical case study situation is used as a basis for class discussion of these problems and their relation to systems integration , design, eco· nomics, and over·al1 planning. Prerequisite: Electronic Data Processing: Programming a Business Computer 8S3 or equivalent experience Ilnd consen t of teacher. SAN FRANCISCO Mr. Milne Tues. Feb. 5; 6 :30-9 p.m.; 104 Richardson Hall; 16 meetings; $37 (Class holiday on Feb. 12).

Field Inspection of Buildings and Structures 837A Organization of inspection procedures. Inspec­ tion for zoning requirements, excavation, soils. footings, foundations , retaining walls; wood , masonry, concrete, steel framin~ and stru ctures. First of two courses. Prerequisite : consent of teacher. SAN FRANCISCO: Section I Mr. Watt Thurs. Feb. 7; 7-9 p .m . 101 Woods Hall ; 15 meetings ; $30 . SAN LEANDRO: Section 2 Mr. Maxwell Tues. Feb. 19; 7-9 p .m.; room 214. Bancroft Junior High School; 15 meetings; $30.


CJeMnJ.

"'&in I I..lIte

1"1._

APPLICftIOB8 aI . .

TITLE AND NUMBER

OF COURSE " ' ' ' ' ' , TEACHER'S NAME Alben C. AND ADDRESS __

MEETING

Porter,

~

IQ)JIMICI

Co1lece Aft.,

820

PaJA)

213 Mebu'dtIca BaU, 8.'. Ceater

PLACE

BEGINS

10 MEETINGS

3

OF

HOURS.

ENDS

l'ebJ0uaz7 1", 1_

April 1.6 J

1966

Alto TIMI!

DAY HOUR

COMPENSATION $12.50 per boar plU $2.00 per trip tor t.nwl.

1. Compensation will be paid monthly in equal installments. No payments to teachers will be made during the first month of the fall or spring semester. Checks are iSsued by the first of each month and are mailed as directed by your check disposition. The number of equal payments varies with the length of the class. 2. Final payment is made only after all enrollment cards are returned properly certified by the teacher. 3. If a class is discontinued for insufficient enrollment, a fiat payment of $25.00 will be made for classes of less than thirty hours' duration, or $35.00 for classes of thirty hours or more duration. 4. Please sign and mail duplicate (yellow) copy to Payroll Supervisor, Business and Fiscal office, University of California Extension, 2223 Fulton Street, Berkeley, California 94720. Please direct any questions regarding compensation to the Payroll Supervisor.

PAYMENTS WILL BE MADE IN EQUAL INSTALLMENTS. FIRST CHECK ON:

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Date..............................................

NOTICE OF ORGANIZATION OF UASS UNIVERSITY OF CALIFORNIA EXTENSION

UE路178A-Sm seta路12,'64 (F458s2)259

BERKELEY


GE UNIVERSITY EX'rENSION--UNIVERSITY OF CALIFORNIA Engineering and Sciences Extension Applications of E ngineering Economics 820

Spring 1964

Meeting Number

Text Chapter 1,2

General Subject

A. C. Porter

Discussion Problems

Introd'.1ction IlZld Class Orgonization. The need for economic analysis in

engineering studies.

3

Equivalence.

4

Interest formulas and the time value

of money.

5

Applications of interest formula.s.

3-1, 4-4.

6

A..'1nual Cost.

5-ld, 5-)b, 5-10,

5-15, 5-29路

7

Present Horth and Capitalized Cost.

6-1, 6-7, 6-17.

8,9

Rate of Return and Interest Rates.

7-2, 7-12, 7-15,

7-18.

10

Some principles and methods of

depreciation.

2-2, 2-8.

8-4, 8-23, 9-3.

11

Patterns for economy stUdies.

12

Multiple alternatives.

13

Uncertainties in forecasting.

12-3, 12-17, 12-18.

14

Increment, sunk, fixed and variable

costs.

13-7, 13-8, 13-9.

Introduction to income tax

considerations.

14-6, l4-7a, 14-14.

16

Retirement and replacement studies.

15-3, 15-11颅

17

Sources of investment funds.

16-12, 17-5, 18-3.

15

10-3, 10-4, 10-8,

10-10.

Chapter and problem references are to the text:

Grant and Ireson, Princi les of En ineering Econosz,

Fourth Edition, 19 0 The Ronald Press).


GE

OF CALIFORNIA EXTENSION

Engineering and Sciences Extension

Ul:.rV,~ nsITY

Applications of Engineering Economics 820 Spring 1966 Meeting Number

Text Chapter 1,2

General Subject

A. C. Porter

Discussion Problems

Introduction and Class Organization. The need for economic analysis in

engineering studies.

I'

路,) v /

V

3

ECluivalence.

yl

路V

4

Interest formulas and the time value

of money.

5

Applications of interest formulaso

3...1,. 4..4.

6

Annual Cost.

5-ld, 5-5b, 5-10, 5-15, 5-29.

7

Present I-Torth and Capitalized Cost.

6-1, 6-7, 6-17.

8,9

Rate of Return and Interest Rates.

7-2, 7-12, 7-15, 7-18.

10

Some principles and methods of depreciation.

2-2, 2-8.

I

V

8-4, 8-23, 9-3. 10-3, 10-4, 10-8, ~ 10-10. \

11

Patterns for economy studies.

12

lf~lt1p1e

13

Uncertainties in forecasting

12-3, 12-17,

14

Increment, sunk, fixed and variable costs.

13-7, 13-8, 13-9.

\

alternatives.

12-18~ . ( ('

Introduction to income tax considerations.

14-6, 14-7a, 14-14. '-::

16

Retirement and replacement studies.

15-3, 15-11,

17

Sources of investment fUnds.

16-12, 17-5, 18-3.

15

Chapter and problem references are to the text:

Grant and Ireson, Principles of Engineering Economy,

Fourth Edition, 1960 (The Ronald Press).


GE

UNIVERSITY EXTENSION--UNIVERSITY OF CALIFORNIA

Engineering and Sciences Extension Applications of Engineering Economics 820

Spring 1964

Meeting Number

/

. ,

Text

Chapter 1,2

3

I

General S1J:bject

A. C. Porter

Discussion Problems

Introdw:tion and Class Organization. The need for economic analysis in engineering studies. EqL1i vaJ.ence .

2-2, 2-8.

I .'

4

Interest formulas and the time value of money.

-?-

5

Applications of interest formula.s.

3-1, 4-4.

a.J.-

6

fu"lnual Cost.

5-ld, 5- 5b, 5-10, ,/

5-15, 5-29路

7

P1~esent

8,9 10

Harth and Capitalized Cost.

. Rate of Return and Interest Rates. So~ne principles and methods of depreciation.

6-1, 6-7, 6-17. ",/

I

...

7-2, 7-12, 7-15,

7-18 .....

8-4, 8-23, 9-3 . ./

11

Patterns for economy studies.

12

ML1ltiple alternatives.

13

Uncertainties in forecasting.

12-3, 12-17, 12-18 . .

14

Increment, sunk, fixed and variable costs.

13-7, 13-8, 13-9. /

Introduction to income tax considerations.

14-6, 14-7a, 14-14. ,,/'

16

Retirement and replacement studies.

15-3, 15-11.

17

Sources of investment funds.

16-12, 17-5, 18-3.

15

10-3, 10-4, 10-8, / "

10-10.

Chapter and problem references are to the text: Grant and Ireson, Principles of Engineering Economy, Fourth Edition, 1960 (The Ronald Press).


UNIVERSITY E1.'TENSION--UNIVERSITY OF CALll'ORNIA

Engineering and Sciences Extension

A~~lications

of Engineering Economics

;::-;::::=;,r.: n / r ;

Meeting Number

---

Text Chc,;ptcr

1,2

~~

"'-:;;

If>

Introduction and Class Orga~izction. The need for economic analysis in engineering studie s • /'

3

Eq:uivalence.

-V

4

Interest formulas and the

time value of money.

2-2, 2-8.

-./. ::.

-

5

Applications of interest fon,rulc,s •

I

r

6

Annual Cost

r

,

:),

Discussion Problems

General Subject

y

.-.. -::

820~

/

~.

/

/

.'

5-ld/ 5-5b, 5-10,

5-15/5-29"-

/"

i ~

7

Present I'lorth and Ca~itD.lized Cost~ 6-:(, 6-7, 6-17.

,.~

h(

0

'j

I ,.1

::L

10

2..

11

Patterns for economy studies.

12

Multiple alternatives.

13

Uncertainties in forecasting.

14

IncreI'.1Cnt, sunk, fixed and v2.:;:'io.ble costs .

I

?

t,

(

7"

I

,I

I

·/ 1'I -I _"1

.' I,

·d

~

v

....-#'"

-

.

8,9

Rate of Return and Interest Rates.

7-2, 7-12, 7-15, 7-18.

Some principles and methods of depreciation .

8-4, 8-23, 9-3. ~~ ' 10-8, 10-10.

.,.-

,I

/ ,/

./

v

/0 -

15

Introduction to income tax considerations.

~ I:;.

</

13-7, 13-8, 13-9. .

;'

.

,

**

/1 14-14, studies. 15-3, 15-11.

16

Retirement and

17

Sources of investment funds.

rc~lacement

,.

16-12, 17-5, 18-3.

Chnpter and problem references arc to the text: Grant and Ireson, Principles of Engineering Economy, Fourth Edition, 1960 (The Ronald Press) .


UNTVERSITY EXTENSION--UNIVERSITY OF CALIFOR..T'UA

Engineering and Sciences Extension

Applications of Engineering Economics Meeting Number

--

Text Chc,pter 1,2

,

7/ (,.

-; j.::

-'/,

General Subject

Discussion Problems

Introduction and Class Organizction. The need for economic anclysis in engineering studies.

-Jr­

3

Equivalence.

2-( 2~.

' 7-­

4

Interest formulas and the time value of money.

3-1.

5

Applications of interest fonlUlo.s.

4-4.

6

Armual Cost

.". """"""­

..

. . /F '-

B20AB

r"

,

-

I

~

:;

,.' ­

-

,

..

/

./co'

• .or.

-­ '" 7

..,'"

/

5-ld" 5-5b, 5-10, 5-15; 5-29·" ,,/

v

,/

Present Horth and Capitalized Cost. 6-1, 6-7, 6-17. t/'

0-/

v

./

B,9

Rate of Return and Interest Rates. M!

7-2, 7-12, 7-15, 7-1B.

10

Some principles and methods of depreciation.

B-4, B-23, 9-3.

~-"!",.

/'

,/

'/

.

//

10- ~ lo-B, 10-10.

-i

11

Patterns for econof.'lY studies.

...-:!­

d

12

Multiple alternatives .

</

13

Uncertainties in forecasting.

14

Increment, sunk, fixed and vc.:.:.'iable costs •

13­::7,

Introduction to income tax considerations.

14-14, 14-15.

V ./ ..../ 12-3, 12-17, 12-1B. ./

..../

13-B, 13-9.

~

15

./

Retirement and replacement stUdies. l5 ~, 15-11 . 17

Sources of

investr~ent

funds.

16-12, 17-5, lB-3.

Chapter and problem references arc to the text: Grant and Ireson, Principles of Engineering Economy> Fourth Edition, 1965 (The Ronald Press).


UNIVERSITY EXTENSION.....UNIVERSITY OF CAJJ::roRNIA Division of Engineering and Sciences

Applications of Engineering Economics Meeting No.

Text Chapter

C'~neral

820AB

Subject

Problem Assignment

1, 2 . /

Introduction and Class Organization­ The Need for Economic Analysis in Engineering Studies

2

3, 4 /

Equivalence, Interest Formulas, and the Time. Value of Money

3

4, 5 /

Understanding and Applying Interest Formulas

5-29

-'

·4

6, A-A

Amru.al Cost

6-1, 6-7, 6-17

7~'

5

7, 8, 9 /

Present Worth, Capitalized Cost, Rate of Return

8-l~j

6

10 /

~. I

f; -1

-

I I

1f.'7

i

:

-/

2'!"2,

~-B,

3..1, 4..4

5-ld, 5-5b, 5..10, 5-15 v

./

I

!

I

Depreciation Related to Economy Studies

14idterm Examination (1 hour)

7-2/,'7-12, 7-15', ' -7-1[3'

8-23, ' 9-3 '

./

v

...}

. / 'J

7

,I

'1/·

8

.1/. ,;, 9 I

I

'/.. .1 10 i;

11, 12, 13 /Patterns for Economy Studies, Multiple Alternatives, Uncertainties in Forecasting 14, 15

Increment Costs, Sunk Costs, Income Tax Considerations

16, 17, 18 Retirement and Replacement, Sources of Investment Funds,

Studies for Public Works

19

./

10-2, 10-8, 10-10

t,/'

../'

11-~ 1?-14, 12-18,

13-15 / 14-15, 14-14, 15-3, 15-11 16-6, 17-5, 18-3

Investment Decisions. Review. Final Examination (2 hours)

Chapter and Problem references are to the Text: Grant and Ireson, Principles Engineering Economy, Fourth Edition, 1960 (The Ronald Press).

*In lieu of Final Examination.

E!.


UNIVERSITY EXTENSION--UNIVERSITY OF CALIFORNIA

Division of Engineering a~d Sciences

Applications of Engineering Economics

820AB

,

)

.I

Course Outline and Assignments Meeting No.

J-/£ 1

,/

I

General Subject

Text Chapter 1, 2 3,

4

Problem

Assignment

/Introduction and Class Organization. The Need

v for Economic Analysis in Engineering Studies

~ quiValenCe,

Interest Formulas and the Time Value

. / l'i~)It'

.j 8, 9, 16, 25.

of M:mey

5, 6 ~nderstanding and Applying Interest Formulas

2713., 3113., 3~a, 41, 47a, 5'9, 6:3.

7, 8

~Annuaj Cost, Present Worth, Capitalized Cost

9, 10 /Rate of Return, Depreciation t-.

0

q~, 7'i, 74/9~, 96, 108, 119. ~ 12ft, 128, 145, 15 4; 175, 171, 1.83. IX

:/ ( 6 '/

11, 12, 13/ General Plan of Economic StudiGs.

./ Mid terr.J. Exunination

J~. 1.95, 1:97,

,

,

Z3 5>, 2,48 • v'\

J/~ 7 \.

Econ~ny

Studies and Investment Sources, Costs, Sunk Costs

Incr~ment

!

8

16; 17, 18 Retiremen~ 2nd Replacement Studies, Eff'2. ~ts of Inc0i'1e Taxes on Economy Studies 19~

20

Econony Stcldies for Public Works, Theoretical Replacement, General Review'

,

" 2:1:221-8 . . . 228

'253, 256, 258, 261, 263. X 289, 293, 299,

342, 345. /'

3:5lf., 3.51; 3&r~'

FinQl Examination Chapter and Problem References are to the Text: Grant, Principles of Engineering Economy, Third Edition" 1950 (The Ronn.ld Press). ­ Typical problems and solutio~8 involving engineering economics from past State Pr~fessional Engineer Exaninations vQll be distributed and discussed during the course.

~ ~


DOLLARS AND SENSE OF

DEFEF~lliNT

What is the income tax advantage in having compensation deferred to the years followlng retirement from active service in the business? The best way to determine an answer to this question is to make a comparison, using assumed figures. Example (1): Assume a corporate executive is 45 years old, married, and has two dependent children. His basic compensation is $20,000 per year. He is also entitled to additional compensation based on a percentage of sales which is credited to his salary account and may be drawn upon by him at any time. This additional compensation av·erages about $10,000 per year. He files a joint return wi th his wife and uses the standard deduction. His income tax liability ....0 uld be as follows: Adjusted gross income •••••••••••••••.•••••.••.••••••• $30,000 standard deduction ••••••••••••••••••••••••••••••••••• 1,000 Balance •••.•.•••••••••••••••••••.••••••••••••••• $29,000

Exemptions (4) •••••••••••••• () • • • • • • • • • • • • • • • • • • • • • • • • •

2,400

Taxable income $26,600 Tax liability ••.•••••.••••.••.••••••.•••.•••••• $ 7,918 Example (2): Assume the same facts as in Example (1) except that the corporate executive's additional compensation is deferred until he retires at age 65 at "Jhich time he is to receive $10,000 per year. His tax liability prior to retirement therefore would be as follows: Adjusted gross income •••••••••••••••••••••••••••••••• $20,000 1,000 Sta.ndard deduction •••••••••••••••••••••••• Q

Balance •••. Exempt ions (4) •••.• ~ ••• Taxable income .......... 0

C

I)

••

••

••

••••••••••••••••••••••••••••••••

ft • • • • 0:,

••

0:1 • • • • • • • • • • • • • • • • • • 0

G ••••••••••• 4

Tax liability

•••••••• 4

0

••••••

$19, 000 2,400 ':';16,600

$ 4,124

After retirement at age 65 his tax liability, assuming his children are no longer dependents but that his wife is also 65, would be as follows: Adjusted gross incame ••••••••••••••••••••••••••• $lO,OOO Standard deduction •••••••••••.••••••••••••••••• 1,000 Balance •••••••••••••••••••••••••••••••••• e$ 9,000 Exemptions (4) ....••.....•.........•....•......• 2,4oQ

Taxable income ••••••••••••••••••••••••••••••••• $ 6,600 Tax liability ••••••••••••••••••••••••••••• $ 1,372 Examples Compared: In Example (1), where the corporate executive received and was taxed on the entire $30,000, his annual tax liability was $7,918~ But in Example (2), where he deferred the additional compensation of $10,000 until retire­ ment, his total tax liability on each $30,000 was $5,496 ($4,124 prior to retirement plus $1~372 after retirement). Accordingly, there is a yearly tax saving of $2,422 ( ~~7,918 minus $5,496) to the executive by deferring the additional compensation to his retirement years.

- 1 ­


Accept the Following Assumptions: 1 - Annual deposits to an annuity earn

3%

per year.

2 - Annual return on a matured annuity is based on interest at year.

3%

per

3 - For annuity and income tax purposes a person has a life expectancy of 15 years at age 65.

4-

An annuity, which does not return the insured person his deposits within 3 years from the beginning of the annuity payments, is applicable for income taxes to the so-called "Exclusion Ratio". This means that a person need not report as taxable income that portion of an annuity which he actually contributed since such funds would have a.lready been subject to income tax. e. g., if an annuity has a value of $100,000 at maturity and a person had con足 tributed $75,000 of that amount, only 25% of any proceeds from the annuity- is reported as taxable income.

5 - A taxable income of $4,000 or less is subject to a 20% tax rate. Make any additional assumptions you think are necessary.

Show

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What are your conclusions about the "Dollars and Sense of Deferment"? necessary calculations to support your conclusion.

- 2 足


Spring 1966

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HERE'S

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Golden Gate Capjtal PROFIT-A 5-year Gro'r'/th Certificates are Capital Growth Certifi­ transfer ownership at

Golden Gate Capital Growth Certificates available in an,y amount cates at Golden Gate no fee or loss of profit.

Growth Certificate h~!d by anyone pur­ in Certificates of $50, National Bank. If. you decide in the

guarantees 22% profit chaser are insured up future to make a gift

$100, $500 and $1,000 to to you. to $10,000 by the Fed­ individuals and lion­ to your children, par­ eral Deposit Insurance profit organizations. ents, church or any in­ Corporation. dividual or non-profit

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Ul'nV}<~RSITY

EXTEN[3ION - -lTNIVERJITY OF CAIJIJ!'ORiifIA Divicion of Engineering Extension ClasG Instruction

Applications of EnginGering Econcrr:ics 820/l,B Timothy J. Canty, Instrnctor ILLUSTPf,TION OF FOUR DEF8ECIATION IYfE'I'HOD,s (a)

TABLE - HEPLACEliJENT ~/JET!:10D - _ ..I_.----_ ..,.._.-.. ........ - -.-.-.----. ­

(1)

(2)

I

I

V"be

~

fe_~_-Kl8~~ 1 2 3 l~

5 6 -(

8

Payment _

for ' Deprec:.;.t; on I 0 0 0 0 0 0 0 0 0 100,000

$lOO,OOO 100,000 100,000 100;000 100 ,,000 100,000 100 ; 000 100,000

10C)J OOO

9 10

(4)

()) ",----------1

100,000) 0)

Ow.ner t 8 Retu:cn (6% of col. 2) £6 , 000 <, 6,000 6,000 6,000 6,000 6,000 6,000 6,000 6, 000 6,000

~, 100 ,000

11

100,000

(5) Total Consumol's

i

Pa~'llient8

(cols. 3 & $ 6,000

1 1

11-

I

)

'-----J

I I

6 oOO

J

6)000

6,000 6,000 6,000 6,000

";l _ .

.;,Cr J

..

~

,.

6 ooo J

6,000 106,000

$ 60 ,000

*160,000

6,000

6,000

0

"

r I

". _ _ _ _'_ 0 _ _ ­

'l'..\B.IE II - SINKING FmJD !vfl.!:TfIOD

(J '

(' l )

3)

.-;Iv81:8-o:-r:yment8 te

~

(

(3a )

Il Earnings

~~E_~~Pl~~__..L.§jn~:.i!'l~_lf~?-L .S':'nJ:i:qB 1 2

3

4 5 6

7' 8 9 10

,(~100 ,000

:$ '( ;')87

lCO ,000 100,000 100)000 100,000 100,000 100,000 100,000

100,000

7,587 7,5 8 7 7,587 7)5 87 7 J 587 '( ; 537 7,587 7,587

100,000)

7:587

( 4)

~-cwne-r~t .

-c;:~;:~: 'I

s':":"'R-e"-t-,u-r-n--C-:

1 .(rtf of ~91. 2) i Fllnc:L_ 6, 000 6,000 938 6, 000 1,449 6,000 1,991 6,OOJ 2,566 6) 0(10 3,175 6 J 00'0 3,821 6,000 4,505 6,000 5,230 6, 000

$ --4SS

( 5)

*

(C:_OJS~:~.~uJ $

13,587 13,587 13,5 8 7 13,581 13,5 8 7 13) 587 13,5 87 13,587

!

. ~ v

....,

f'

~~'O

13,5 87 13,587

0) $60,000 11

100,000

7

6,000

(a) From Masterts Report in Pa cific Gas 2.nd Electric COr1pany Gas C<:!88 (CRG Case No. ~'+2L,~) ,beftre U. 8: Distri9~6Col:lrt f?r the Fo~t~erna,Dist)~lct of California J ?outhorn D:!.vH)lOn l.n Eou~ty No. :':;0 08). Ieem of ~)lo.nt = <{)100,UOO, no salvuG3, Llfe 10 Years, In oresi' b~o.


Applications of Engineering Economics 820M} - Illustration of four depreciation methods - page 2

(1)

(2)

(3)

(4)

(3a)

II II ~:lue ~~--~ayme~tB t~~:nil~g-S-O-f--'l-oWC1er!S Year

Plant

DepreciE'.tion,

___~______ L-Re2,er'ITe ~)100 ,000 $ 7,58-""'7 - - ' 1 1 2 92,413 8 ,042 3 84,37 1 8,)24 L~ 75,847 9 7 °36 5 6 7

8 9 10

66,811 57,233 47,080 36,313 24,910 12,613) 0)

100,000

11

I

Reser'le

(

Return (6% of coL 2)

-1-

$ 6 ,000

)

($---;-1~-55)

5/34:]

5,063

9,57 8 10,153 10 ,7 62 11,408 12,092 12,818

(938) ( 1,1:.49) ( 1,991) ( 2,566) ( 3,175) ( 3,821) ( 4,505) ( 5,230)

$100,000

($24,130)

7 .. 587

4 , 551 4)009 3,434 2,825 2,179 1,495 769

Total Conswners I Paynents ( eols. 3 8: Jill ~~ 13, 50'T 13,58"( 13,5 37

13,587 13,587 13,5 8 7 13,587 13,5<37

13.587 13:587

+ $35,370

$60,000

6,000

(Dec:'..D;:3-1s rounded out)

TJi.BlJi: IV - STRJl.IGHT-LIJ\TE METIIC'D

(1) (2) (3)'------~--------i----· Year 1 2 ~

4 )

6 '7 8

9 10

ill (52 - - - J.l~ ~i'____ , _ . _._ ' ! ----r---Tota-l---:I

Value O I~ I~ Payro.e nts to Earnings of Owner 'll Return, COnSUITl,jYS! I

Plant ! Depreciation ReS8rve (610 of col. 2): Pa;y-ments ,_____, _,_~e_~':::.:,!,_8_ _-'-_-;--_ _- - - ' : - - - l - _ LLcOl,~.-:_3-.tJ!21 i ;p:<OO )000 $ 10,000 ( ) ~~ 6,000 $ 16,000 · .'-1(1-;" j';>/ 90 }OOO 10,000 ($ -bOO) ::J }4CJ 15 : 400 . ',:, l "j , .,' 80,000 10,000 ( 1,200) 4,800 14)800 x . n 0 70,000 10, OCO ( 1,(30)) ~.,2CJ 11t,200 . '~.-' 3 ­ 6 'J)000 lO, OOO ( 2}400) 3,600 13. 60 0 / .-.,-;,7<0 50,000 lO} OOO (3,000) 3}OOO 13:000" , 7,S; , 7 ~.o ) ooo 10; 000 ( 3,600) 2,!.~C') 12 , 400>'· . 5 - ' 30 }0 00 10, 000 ( L~ ) 200 ) 1 , L~oo 11 , 800 . i"" 20,000 10, 000 ( 4,800) 1,200 ll}200 , · 5 ' - !," 10,000 ) 10, 000 ( 5,400) 600 10;60u-·· ':"5.~'"~ 0) , /""

,I

I'

(~ J'"

~~ 10 0 :000

($27,000)

$33,000 $60)000

6,000 T

I

.

...

ft

16,000

10,000 11 $100,000 ,---,------­ Note: E.J.rn:i_ngs placed in pC1re~lth0se3 are not part of tho roseI've; thes o earnings calong to the mrnel'.


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\ DOLLARS AND yENSE OF DEFERMENT

What is the income tax advantage in having compensation deferred to the years following retirement from active service in the business? The best way to determine an answer to this question is to make a comparison, using assumed figures. Example (1): Assume a corporate executive is 45 years old, married, and has two dependent children. His basic compensation is $20,000 per year. He is also entitled to additional compensation based on a percentage of sales which is credited to his salary account and may be drawn upon by him at any time. This additional compensation averages about $10,000 per year. He files a joint return with his wife and uses the st~~dard deduction. His inoome tax liability would be as follows: Adjusted gross income •••••••••••••••••••••••••••••••• $30,000 Standard deduction •••••••••••••••••••••••••••••••••• 1,000 Balance •• , •••••••••••••••••••••••••••••••••••••• $29,000 Exemptions (4)........................................ 2,400 Taxable income $26.600 Tax liability ••••••••••••••••••••••••••••••••• $ 7.918 Example (2): Assume the same facts as in Example (1) except that the corporate executive's additional compensation is deferred until he retires at age 65 at which time he is to receive $10,000 per year. His tax liability prior to retirement therefore would be as follows: Adjusted gross income ••••••••••••••••••••••••••••••• $20,000 Standard deduction •••••••••••••••••••••••••••••••••• 1.000 Balance ••••••••••••••••••••••••••••••••••••••• $19,000 2.400 Exemptions (4) •••••••.•••••••••••••••••.••••••••••••• Taxable income •••••••••••••••••••••••••••••••••••••• $16,600 Tax liability $ 4.124 After retirement at age 65 his tax liability, assuming his children are no longer dependents but that his wife is also 65, would be as follows: Adjusted gross income •••••••••••••••••••••••••• $10,000 Standard deduction •••••••••••••••••••••••••••• 1,000 Balance ••••••••••••••••••••••••••••••••••• $ 9,000 Exemptions' (4)................................. 2.400

Taxable income ••••••••••••••••••••••••••••••••• $ 6,600 Tax liability •••••••••••••••••••••••••••• $ 1,372 ' Examples Compared: In Example (1), where the corporate executive received and was taxed on the entire $30,000, his annual tax liability was $7,918. But in Example (2), where he deferred the additional compensation of $10,000 Wltil retirement, his total tax liability on each $30,000 was $5,496 ~124 prior to retirement plus $1,372 after retire­ ment). Accordingly, there is a yearly tax saving of $2,422 ($7,918 minus $5,496) to the executive by deferring the additional compensaticn to his retirement years. O\t'b of $100,000 of

addiM:()ftel-~ eompen8Mi~,.for, . & '

period ol-l,O- ¥eue.r"tQ.ep-et.oJl.&'Y~-deteI mellti -t&-ifl

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Accept the Following Assumptions: 1 - AnnuB.l deposi ts to an annui ty earn 3~ per year. 2 - Annual return on a matured annuity is be.sed on inter- ' est at 3% per yeBr~

3 - For B.nnui ty and income tax purposes a person has a life expectancy of 15 years at ege 65.

4,-

An annuity, which does not return the insured person his detosits within 3 years from the beginning of -&e annuity payments, is applicable for income taxes to the so-called "Exclusion REltiol1. This means th~t a person need not re足 port as texable income that portion of a.n annuity which he actually contributed since such funds ~ould have already been SUbject to income taX. e.g., if an annuity has a value of $100,000 at maturity and a person had contri足 buted $75,000 of that amount, only 25~ of any proceeds from the annuity is reported as taxable income. Make any additional assumptions you think are necessary.

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UNIVERSITY EXTENSION--lJNlVERSITY OF CALIFORNIA

Engineering and Sciences Extension

Applications of Engineering Economics 820AB Final Examlnation - April 23 .• 1960­ Total Possible Points- 60

Discuss the meaning of "irreducibles" and. their effect on Engineering Studies.

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II. - 3 points Explain the differenc6 botween compound and simple interest? is always used in Engineering Economic StUdies and why?

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Applications of Engineering Economics VIII

-c3!J"'p"oints­

A corporation expects a taxable income for the current year of $100,000. Consideration is given to an additional business expenditure of $10,000 and it is believed that this expenditure will be fully deductible from taxable income for the current year. If it should turn out that no increased r~o0ipta ever result from this expenditure, what will be the net cost to the corporation? (Disregard state taxes, other income, exemptions and interest credits)

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IX - 5 paints Prepare a double declining balance depreciation table for an asset having a P of 100%. (Round all figures to nearest whole percent) Also show salvage percent. {/- ~,. , , /00

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x - 10 points Compare the following two alternative assets on the basis of exact annual cost, present worth, and capitalized cost. Minimum attractive return = 8%. Asset B

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Applications of Enginoering Economies 820AB, Final Exam, pago 7 XII): - 5 points Calculate the total state and federal income taxes for a California corpora" tion having n taxable income of $750,000 with interest credits of $50,000. (Use r a tes discussed in class)

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Engineering and SCiences Extension

Applications of Engineering Economics 820AB A. C. Porter

Student f S Name

Total Points - 60

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Final Examination

April 22, 1963

1 - (10 points) Mr. X owes $3000 on a loan that has 6 years to run. He is making equal semiannual payments at 8% interest per year. He has an opportunity to borrow $3000 at 7% interest and make equal semiannual payments over the next 7 years. However, if he were to cancel out his present loan it would be necessary to pay a $100 penalty. He has an account with a credit union which earns 4% interest to which he would deposit any savings made from his semiannual payments. His present balance with the credit union is nominal. What course of action would you recommend? ~;I

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Compare the following two alternatives on the basis of exact annual cost, present worth, and capitalized cost. Minimum attractive return = Mo. Assuming 30 years service to be a solid estimate, which plan would you recommend in the light of recent past history? Building A . Building B

$60,000

First Cost Life Salvage (Net) Annual Expenses

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15 years $10,000 $ 5,000

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6 - (5 points)

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a~d

It. is t.bia btl-t-r ar-aa which lGIlY ~ broadly deac:dbed u En81.neer~ 1aa-Bcooo-ic l' ·\ aDnlng •• tn the 61mst'! used here ·platmiou.' illplies far IIOr. than I~r• • upervision of eag! neering wor\ with the •••~1at.d fwactiaos of payroll. 4Cc04lDting, per8~nn.llMQ8ge~nt, ..te. It bsplit>. considerably more than tbe 'broadbrusb' ccoocept1on of ttl. future ,<lbich 18 sometime£ aS5cxiated with plaanio b "

BnalDeer1na-lelllloaic Plt\DIliaa is tlW quantitative: evaluation of project. aueking to sn.war t.be ba~ '~c que.Uou CC"~e ~ __ t·j by Geoeral Carty;' Why do thJ.s at all? Why do it now? Wby do 11 : thh ",ay't t Any woc'.;:b1tlb1le eLlg1.oeerl1lg work. t;hould au(:ct'!8.fu!.l Y piUUi t.be ~•• t of tbes. qUflstl0G6,. l'h"~e CjI~ellt10Cl8 willM recogn,z.d 813 thr. ba.is oJ .ng~!W6rioa e.:onOllly·-The pro·::.,duu by wht .. h 'bi! flfnginear seeks to <ifvciluatfl &It.rl1a ': tv~ solut.l0<Cl8 to It poblell in 1I1OUr:~.' I:;er.ll L .. ol-dec to .elect t.hat ah.ecu,edve which IMkea the " 'it poselble use of a Llmited resour..:e--1 uve&trl!f~nc fl,'. rds. 1

",\h. propo5l,l c"JDtinued

oy

poillUQ& out tbe u.ce4t:i ty fo.-

iDve.t1.gatloa of luvestment d.c .i.lJion&

i~

V'.J.bl1c work• • inul.

of tbe 111lpQrtant publ1= works Pirog"'" hl

t;~e'l:nited

without ttw r..eoeHt; of tbe applicdUcn, ('tor

th~

furl:b~r

at~r(;:8t!nl:.

e.any

St«lt.f5 have!. been l .... f,(:b.<i

ka1e pdndp1ea of .D;i1D4:1e('l. ci~

(!?toswaay.

,

b

IPropo•• l to the 'ord 'owadaUoQ for a 'P"oj.ct tn Rngine.lll.g-Eco"OOGJ.lc PlaDlli'':8. StaDford Univenity Scilool of 1:aa1l!t€:l"iU6. Mer;.:h lU, 196Q,


One of the reasoas

fOt'

tbis is tba;::

The area of Engineering-Ec·>nOm1('. Planning baa t-eeft seriously n.e gleeted 10 engineerin& e1ucstiOll. 0.1, rer.eD.tly has stUN a.eeo laid Oft the locluaioa of study h. tw bUtD84!Ues u~l 60cial acieaCe. ia tbe _@,iaeeriDi currie"l... The first cQUrse ill ewaai. .er1.aa ecoaom, ia ati11 Dot.required in waay engineering curricula and few .c~h offer anyt.b1n& _yODel a firat course r~e tncJ:'eadag e.pha.l. Oft scieDCe a~ tbe eQgioeeriDg carriculum threatea. to further to "oulanee tbe level ietweea scieDCe aod pl. . .ing. Tbb pl'opo.ed project at Stallfol'd in logioeering-Icooocaic Planning is c~elved as a &,tep 10 the streagtbening of .. du~at1OQ in tIM plaDld. aua 1 0

0

ODe of tbe r ...ou tbat St4nford -OU&bt fioaoeia1 support frOID the foundation was tbat a. a private uulv.ralty it i . 1n a .pecial poalt100 with regard to .tudie. of public work..

The faculty c;:au exp_e.s opiD10Ge oe cootro­

versial 1...... witbout fear of poll tical reperc:u.a1oaaa ataffs of

pu~lic11

~ich

ad.Sht di8COIIIrqe tbe

S~fOl'd

."PP0l'ted school•• . At the .... ti...

~h.,.

favored poa1t1OD to .ecure fioanchl support from pubUc

i. i • • le,s­ e.pec1ally . t

the atate IOVeraDeDt level. Ia 1960, the 'ord Fouadation . .d. a graat of $3,400.000 to the School of Ensi. .eri. . _ TIlt. Irant included aa Illa1ne«laa-&coao.1c PlanoiO;.

of ita ai. . . .uppol't for the Project ia

ODe

wa. an appropriate place tor .uch a

StanfOK'd

IraDt 1M!c.".e of ita 50-year history of leadeuhip io the field of eog1Mer1ng The late Prote••or J.C.L. Fl.h wa. reaponaibl. for early work In the

ecooo.,. 6c~1

of IDal. . .r1na 1n thia field.

for~rd

His effort. were carried

and

ex.paDCled duri. . the la.t thirty years by ProfeSSOI' B.L. Graat with .upport ill reeeat

,..1'. by

Profesaors W.G , Ireson, C.H.

Ogle.~.

1..1.. Liuley. aDd other••

To ac:ca.pUsh tbe goal of f.mproved decldon..aUog the EIP gl'Ult: (1) Support. reaideat faculty for teacbillS. r,.earch. aftd of 4efla1tlve

~lic:atlOD

11terat~re.

(2) Perwdt. distlngalsbed v1aitlA8 faculty to

~

in r . .ideace duriaa

eM ac:aclee1c y . .r.

'"

(3) PrOYide. fioaDClal aaaistanc. for graduate eagin.eer. for atucly aad r . . . .reh

OIl

tbe application of eagiaeer1na ecoaa.y aDd other aida

to deci.ioe-_Ida,g to

(4)

,..b~~c

expendit:ure problellil

0

.

hftlo,. Ph.D. '. f« acad..tc e.....r. ill eaa1"'l:iaa-ec:ODOIa1e

P~"·

..

.

-2­

~------. - .- ..-.-

.-

.

--- --

.. .....


.

'

.

..

)

.

.

',.

. "

.

.

-

• -.­

1aicl..1 pl. . . . for lIP wa· accOIIpUaMd ~ a. i.cer-41aclplSU., .~tt... c . . .tatt. . . , &.culty fraa ~ . . . . ~&a- of Civil, E1.ctrt~I •. '" i~rial' ~

0

,

.

I

'

l . .iaHI'i... Icoacwic•• Pol1tiM1 8ci~e, Statiadcs, ~ the Graduate Scboo1 of

...1.....

n.

q. .ner 1'61.

.

c~tt•• _ta~lt.bed

a

p~OSraa

'that Wlent into Opar.tlOil the faU

"

'

..

0

,

•• Project DinetGC' with DeaD J08epb II. Pettit .erring a8 ex-ofticio diraetor~

-.

"

1ft~ ,the l".tlr~

tbe

"

Co..ltt. . activ1t1•• wer.· ori,ioally lead ~ Prof•••or • .l.. Craat

of Prof..... Gr_c in 1962, Profesaor Bay

'l'he Project _

I taaford , • lutttut. la

l.iMd'ia~Ec:ODoudc

BDa1....ril.g-EcODOmic

c"ir.ua.

It. Li..1.,. Mca.e

Pl&IIDiQg 1& DOW • part of

SysteM wbicb iDClude8 lD ita kOpe

tb. t.tearatt_ of political, Social, acOGOmic and tachnical futor. to at,d

dect81oe-.-kJaa ia

, ~tb

the public and p~ivate .actors.

Siac. 1961, offer1D8s have beeD developed wb1cb are aimed .,..ciflcally at illprovi. 4lecia1oa__ kiaa iD pubUc workB.

Some of the cc.-e cour••• i .

Illaiaeerlaa-Icoaom.c PlaDDing are:

.

EDgiDeering Econo.y, Advanced En&ineeriag

Icocao.y, Capital ....dg. t illS , D.preciation,latroduction to Price Theory apd ae.ouwce Allocatioa. lcocaoaic8 of Public Woru. Public P-luDce, Coat AUocatic.n. Water Law, Water

a...~ce.

'laDDiDI, H1abway Planning. Iotroduct100 ta Begioaal Pl.DA1aa,

Tr....portaUoa PlaaDiag, The laatit:utiooal Settlag for Public Workj l'laDDio.g. Governmetnt aDd Ratur.l

Works,

1le.ource~.

and The Plaoniag aDd Kauge.aat of Loul Public

III additloa. tbere are cae. work courses dealing with EcoaoGdcDevelopaeat

Progr8Dl1iaa. hbUc Woru Probl. . of Developing

Natio~,

a.tional Def.... , Public Utility

th~

of Small . . .i . . . .5.

aeAul~tl00.

and

Oecia1oo Plobl. . . in

EngiaeeriDg

.n~orgaDizatloD

Course. in S,st... Analyal •• S tad.tics. Oper.t:ioas &.esearch,

aDd Computer Sci.DC'e are alao

offt:1:~d

Ln the llnlverBity.

Vi.1tlna professora brought: to St.anfor d to 5cceogtben EEP .act to present specIfic course. bave iocluded Robley ': Jinf'l:ey, Chief, Highway Rftds ",nd Economy D1 visioo, U.S. l'ur..au of Public Roads;

Proi~eS6Ci'

Jack Dyckman. formatly of tbe

Department of City Plann1.... UDivenity .:Jf PelUlsylvallia and

DOW

with the University

of Cal1foraia; Sherman B. GreeD. J:hf.ef. MIa I. ti-Purpose Projects Branell. •

Se~ttle

District. O.S. Aray Engineera; Ilicllard M iat'tl .e. Kuulcipal.'loaDCe (;onsultaDt;

Bmeritus Prof•• eor M.Il. Kirkwood,

fo~r

Stanfo.d Law School DeaD; and C.I. OstergreD.

r.cently retired D:Lrector of Engiaeeri.llg Econca1c8 of tbe lell Telepbooe S,.te!D-

More receDt1y, ......1. has shift..d frOta the

"Vi8i~1na

profe••or" approactao

Ratber. r.aular faculty pre.eat the subjects 1D order to develop a .are 1ot.grated

approa~h aDd to lead stabUity to the proaram "

Three professors have ~en

appoiDted to .trenstbeu the BEP proaram. these ar.:

Julius MaraoU8. P'rofeasor of

CI vll Engiueer:1og .ad Economics j Gerard ~. Booo. A.sociate Prof•••or of ladu8trial '0 !ngioeering; aDd Robert R. Lee, Assistant ?rofessor of Civil EagineeriQ8.

-3­


~

. ,..-"""," " "

COMPARISON OF RESULTS OF MORTALITY ANALYSES

BAUHAN METHOD vs. BRENNAN METHOD

Bauhan's method is a trial and error procedure which selects the best fi tting mortality curve from a set. of 28 11 type" mortality curves including the Iowa series . The criterion of best fit is the standard error of plant balances . The method is described in Edison Electric Institute Publication No . 5l ~ 23 (1952). Bauhan ; s method was programmed. for the IBM 705 Calculator so as to select the best curve for a specified "band" of years, usually 5 or 10 years of the most recent experience. Brennan's method is analytic and is based on a parabolic retirement denSity function. It can be applied to any band of years, or combinations thereof . As presently programmed for the IBM 705 Calculator, one of the parameters is determined by the method of least squares and the other from a selection of various assumed values, within the calcQlator. The method is described in the Proceedings of the National Conference of Electric and Gas Utility Accountants , American Gas ASSOCiation, Edison Electric Institute, Chicago, April 1959, pp 323-355 路 , In order to make dire ct comparisons for the two methods, two criteria Were adopted. The first is the standard error of the retirements in the band for which the curve was derived. The second criterion shows how closely the mortality curve derived would reproduce the actual retirements that occurred in the given band. This criterion has been called the "% error of F" .

L

A run of 78 mortality curves has just been completed. Both Bauhan's and Brennan's methods were applied to the 10颅 year band 1951-1960, inclusive. The total amount of plant involved in these runs is approximately $2 billion. The attached table shows a comparison of the results found.


SUMMARY

COMPARISON OF RESULTS OF MORTALITY ANALYSES

BAUHAN METHOD vs. BRENNAN METHOD

Each method was applied to 78 accounts of electric, gas, water and common plant for the 10-year band 1951-60 inclusive. The Bauhan Method selects its "best" curve on a criterion of plant balances. The following comparisons are based on retirements only, as the Brennan Method does not employ the plant balance criterion. Number of Curves for which Bauhan Method Brennan Method gives lower gives lower %Error %Error ;) S S [F 28

6

%Error

Notes : (a)

F

o

(b) S

LF

72 =

100

l)c -

50

LFo

=

calculated retirements

=

actual retirements Standa<t:'d Error

where

I)o

=VL~ n

where e = F

c

- F

0

(c) Each method is given credit for the lower criterion found, even though in some cases the differences as between methods are not statistically significant. (d) Running time on IBM 705 Computer Bauhan Method Brennan Method

10/30/61

10 minutes per account 2 minutes per account


-.足

...

CASUALTY FAILURES

Effect on Reserves and Value Estimates

J. F. Brennan

Digest

Physical plant destined to fail for chance J or casualt;t reasons ~ does not depreciate while in service. No reserve is buil t up for i t in the plant radix of which it may compose all or only a part, It is un = necessa.ry in making an estimate of value of plant to isolate that portion whose casualty retirement is predictable o

Oct. 1961


CASUALTY FAILURES

Effect on Reserves and Value Estimates

Int roduction A substantial proportion of all failures (retirements) of public utility plant are not related to time, but are of the chance or casualty type, equally likely at all ages.

The Depreciation Committee of the Edison Electric

Institute, as a result of an inquiry into c-auses of retirement, reported(l) that from 70 to 8010 of the property studied had been retired for functional , not. physical, reasons

0

Some functional causes are probably related to time.

Obsolescence,

for example, the result of technological progress, is not in general predictablej and yet its effect upon some types of equipment shows a fair degree of correlation with time.

This is probably because economy rather than engineering efficiency,

i s the criterion of plant replacement .

Thus economic inertia produces a time

lag between invention and use which could account for a degree of time - correlated obsolescence. (2) There still remains, however, a large share of total retirements which are of pure chance, or casualty, type and it is proposed to show in the follow 足 ing paragraphs how these failures affect they have on value estimates .

depreciatio~

reserves and wllat influence

It will be necessa:r:y first to define "value" and

to develop some equations in which it is involved.

(1. ) An Interim Report of the Depreciation Committee, Edison Electric Institute,

Jan. 1940, p. 11. ( 2 ) TechnoloEical Trends and National POlicy . Washington, 1937.

National Resources Committee ,


-2­

Value In this paper, "value ll is used in a somewhat restricted sense. "Relative Value" would perhaps be a better term, since value will be derived as a ratio of the worth of one plant (or plant item) to the cost of a similar new piant.

It is assumed that there exists a market for the products of the plant.

The most valuable plant among the alternatives that could be chosen then becomes that which minimizes annual costs.

This is the principle of equal annual costs,

which states that two plants have the same value if they produce identical service for the same cost per unit of service.

The depreciation element of

annual cost makes provision for the different life expectancies that may exist among the possible alternatives. A further restriction will be the consideration of only the interest and depreciation components of annual cost.

The effect on value of other

elements of cost, such as varying maintenance J can always be separately estimated. These factors are excluded herein as they do not bear upon the particular problem to be treated. Following is a list of the symbols to be

employed~

years.

x

==

time~

y{x)

=

the ratio of plant surviving at age x to total plant installed. Thus y(O) = 1.0

f(x)rue

retirement frequency density function, glvlng failures during incremental time dxo f(x) == dy/dx and is everywhere negative since y decreases with time. It is sometimes (as will be done herein) treated as positive.

¢ (x)dx

= casualty retirement density f unction, giving casualty failures in time rue

:;

r

age of last survivor of a plant group the annual rate of interest on investment, defined as the break­ even minimum acceptable rate of return to the suppliers of capital. (3)

(3) Pau.l H. Jeynes and L. Van Nimwegen lIThe Criterion of E.conomic Choice" A.I.E.E. Pub. No. 137, Power Apparatus & Systems, Aug. 1958.


-3足 p

= continuous-compounding compounded annually.

interest rate equivalent to rate r Thus p ~ loge(l+r)

=

depreci:ation reserve at age x

=

ux/y(x), the reserve as a ratio to plant at age x

crf

=

the capital recovery factor, (4) or level annual sum of interest and depreciation rates over the plant life, at interest rate r annually compounded, or p continuously compounded.

v

=

relative value ratio, or the ratio of the value of a given plant or unit to the cost of a similar new plant or unit .

Development of Equations The sum of the annual rate of interest on investment and the annual rate of depreciation is called the "capital recovery factor" .

It has been shown(5)

that the present worth of this factor is unity regardless of the accounting method used for recording depreciation, the rate of interest on investment or on reserves, or the frequency distribution of retirements . general statement of this

The following equation is the

relation ~

w

crf~e-P~(x)dx o

=

1

From this we may write the definition of the capital recovery factor a '"'. Q

'

=

crf(X=O)

1

(1)

At age ex. the survivors of the above plant will be y{oc), and their crf

over the remaining

(w-~)

crf( x

(4) E. -L. Grant and 1960, p. 83 et. (5) J . F. Brennan. Transactions of

=0(

years of life will then be

) =

y(cx: )

(2)

poclW"px e ace y(x)dx

W. G. Ireson. Principles of Engineering Economy, 4th Ed. seq. ] Ronald Press, New York. "A Note on the Capital Recovery Factor" . Paper 61-923 the A.I . E. E., 1961


-4足 The term e~ in the denominator translates the factor to age~j without it, the expression in the denominator would apply to age zero, because of the limits of integration specified in (2). To find the value of plant of this class at level annual costs, or crf's age

~

(1)

and

(2).

age~,

we need only equate

Thus, if v is the value of plant at

relative to that of the same quantity of plant at age 0, we have 1

=

eP'<

1

e -PXy ( x) dx

,

4.J

ePcxLe-PXy(x)dx

whence

=

y(rx Equation

(4)

)1:

(4 ) -PXy(x)dx

sets a value on the older plant such as will make its

annual cost (crf) equal to that of a similar new plant.

(4)

In addition, Equation

states that the ratio of the value of an old plant to that of a similar new

one, per unit, is simply the ratio of the present worths of their future service years. It will now be shown that the

r%

taking

v~

in Equation (4) is also equal to one less

sinking-fund reserve ratio at age C(. U~

Denoting the latter ratio by u and

as the present worth of future retirements minus the present worth of

future annui ties, ( 6 ) all at age ex', we have

~=~= y(c()

P e

<::<:

Y(I'X)

{-l:-PXf(X)dx _ [ 0(

Ie

1 -pXy(x)dx

w

(The minus sign before the first integral is used to make the term positive.)

(6)

The annuity rate is developed in reference (5) ante.


-5足

(6)

We next integrate by parts the first term within the curly brackets of

(6)

and obtain:

l

(JJ

e-

px

f(x)dx

e

-px

jW y(x) fA.

l

w 足 px

+ P O\.e

y(x)dx

0(

Then since y(~)

= 0,

we have

(8) Substitution of (8) in (6) gives

Ua; = 1 -

Vac

From this we conclude that the theoretical reserve ratio at age

~

(10)

(See Equation (4))

r%

sinking-fund depreciation

measures the accrued depreciation under

th~

equal-annual足

cost doctrine. Casualty Retirements If all retirements were of random incidence, unrelated to age of plant] "the force of mortality" or percentage rate of change of plant would be constant at all ages.

For this condition we would have 1 y

where cl is positive.

(11) The derivative is negative since y is decreasing.


-6足 Inteigration of this expression produces the casualty type mortality curve: y(x) where c

2

= c2

e

= y(O)

-c-x

(12)

1-

is the amount of plant at age O.

The average life of plant (expectancy at age 0) is found by integration, as follows: 00

J

QD

= -1-

E o

y(O)

o

x ce -cl dx= 2

(13)

=

Similarly, the expectancy at any age

(X

would be (14)

=

Comparing (13) and (14), we see that the expectancy is the same and constant at all ages.

Furthermore, since (13) and (14) are the negative re足

ciprocals of (11), we may say that the straight-line depreciation accrual rate exactly equals the rate of retirement at each age.

Hence, no depreciation

reserve accrues with time. We next show that the sinking-fund method likewise produces a zeroreserve for casualty retirements. The sinking-fund reserve at time oc may be obtained by calculating the compound amount of the annuity from age 0 to

age~

and deducting from this

the compound amount of the retirements for the same time range. The annuity rate is given by 1

p


-7­ If we set c

2

= 1 and put y(x) = e-cl

x

into the denominator of (15)

we obtain

J

uJ

IV

e-Pxe-Clxdx

=

je-(P+c)xdx

o

0

w

e - (p+c)x

=

-p-c

=

(16)

o

Now substituting (16) in (15) we have the sinking-fund annuity rate c • l

This turns out to be the same as the straight-line rate and is precisely

the annual rate at which retirements occur, as noted in Equation (11).

From

this we could conclude that no reserve accrues on the sinking-fund plan, regardless of the interest rate employed. As a further verification of this, we proceed with the calculation of the depreciation reserve at age oc :

Integrating by parts the second term of the right-hand member (as was done in (7) ante) and substituting the result in (17) we have c(

0(

Doc • C1iePXy(x) dx + ePXy(x{ - P

l

0(

ePXy(x)dx

(18)

tX

=

(c

l

- p)

~ePXy(x)dx + ePXy(~)

- 1

o

Now if y(x) = e- clX be inserted in (19) and the integration performed, we find that Do<.

= 0

(20)

These equations show that in a radix yeO), all of whose members will fail (retire) because of casualties, no depreciation reserve will accrue under a sinking-fund method, regardless of interest rate (including 0 interest),


-8足 We will now investigate the more common case in which retirements occur for both chance and time-dependent causes. Failures for All Causes Benjamin Gompertz(7) made the first statement of what has become known as the

Gompertz-Makeham~

or more Simply, the Makeham law of human mortality.

Gompertz postulated that death is the consequence of one of two independent causes, the one chance, equally likely at all ages; the other the growing inability of humans to withstand natural degenerative processes, this latter increasing in a geometric progression with time.

Thus he laid the foundation of the well-known

differential equation:

(21)

where Lx is the number of people living at age x, or y(x) in the notation of this paper. This equation defines what Gompertz called the "force of mortaliti'. It is the unit rate of change, or the percentage rate of change of the survivors. Integration of (21) produces the familiar Makeham equation

(22 )

where k, data.

s~

g and c are parameters fixed by analysis of experience

Countless applications have shown that this equation gives an acceptable

description of the mortality of a wide range of physical property types. Substituting our notation y(x)

=L

x

in Equation (22) and taking

logarithms to the base 10 (for later computational convenience) we ha.ve log

lib

y(x)

= log

16

k + x log

10

S

+ c

X

log 10 g

(23)

(7) Gompertz, B. "On the Nature of the Function Expressive of the Law of Human Mortality", Royal Society of London Philosophical Transactions, 1825 Volv 115, pp. 513-585.


-9足 The logarithmic derivative of (23) is 1 Y

(24) Equation (24) is in the form (21) and shows that the retirements in

year x will be made up of two

types~

Casualties ,9

[ log e

Time - dependent failures,

sl

y

J

(26 )

[loge g lOgec]cxy

The annuity rate for casualties may be obtained by noting that

raJ A.rmuity ra te=

)0 e -P1(X)dx J:-pxy(x )d,X

a

Since casualties are a constant ratio of y(x ) , as shown by (25), (Le,

~(x)

annUity

= y(x) logeS), we may substitute (25) in (2'7) and obtain the casualty

rate ~

w

log s e

le-P~(x)dx 0

_ IJ.)

J a

(28)

=

e -pxy(x)dx

Now comparing (28) and (25) we see that the annuity rate equals the retirements rate and hence no depreciation reserve will accrue for casualties.

Thus , according to Equation (10), casualty retirements do

not create any value decrement in a property group of which they may con足 stitute the whole or only a part.

Furthermore, they need not be isolated

from the plant group in making a reserve or value calculation. seen from (25) and

As may be

(26), each will have its own annuity rate, but only the

time=dependent portion will create a depreciation reserve,


-10颅 NUmerical Example A numerical. example is presented on Tables 1, 2, A Makeham equation was first chosen to

years.

y~eld

3, 4 and 5 following.

an average life of the order of 10

To make such a selection we may begin by assigning a 10=year expectancy

to the casualty

retirements~

these being assumed as a first approximation to

constitute 50% of the radix of 10,000 units.

Applying (25) we ma.yestablish

a vai.ue for logm s for these conditions by the equation w

2 路3026 loglo s

I

y{x) -. 5000

x=O w

L

Now for a 10,000 radix and a mean life of 10 years 1 y (x) ,." 100 yOOO.

Substituting this in (29) we get

x=O

(This , by its nature", is negative, as y decreased with age). HaYing est ablished the order of magnitude of log I!J s that will. yield approximately 5Cf{o casualty retirements in a 10,000 radix, we may now fix al.l parameters a.rbitrarily, for calculating convenience.

The following were chosen:

whence s :::; 0 .955 c

=

g ::

1.2

whence log/Q g '" - 0.022276 "

0 .95,

Then for y (O) - 10,000, we must have, from (22), kg = 10,000 whence k = 10, 000/0.95 OUr

= 10526.3

equation is then: (30)


-11颅

Equation ( 30 ) is plotted on the chart from calculations shown :Ln columns (1 ) to (5 ) on Table I, retirements for all causes,

Column (6) of this table gives the yearly

Retirements for the two causes J chance and age, are

calculated in columns (8) to (12L inclusive J of Table 10 age ~ depend.ent

Column (8) is the

factor for the '\vear and tearH ret:l:.rements and is taken at. the

half- years since it is an approximation of the theoretical rate of change (for "age" retirements ) in the interval from x to (x + 1 ) , Col umn (10) gives the calcu.lated casualty retirements J Col umn (ll) the age retirements J and Column (12) the total retirements ,

Comparing Column

(12 ) with Column (6 ) we note that there are differences ranging from 1 to 3 units , s howing that the calculations of the age facter in ,Colullm (8) is

8,

good approxi颅

rna ion in the l-yeartime intervals , In Columns (13) and (14) the retirements by causes are rounded to make the tot al of 10 J OOO units for all causes,

'I'he totals at the foot of .these

col:umns reveal that our arbitrarily-se1ected parameters yield 46% chance retirements and 54% "'Near and tear" retirements. The next step in the numerical example is the路路 cal culation of 6% sinking=fund annu.ity rates for t,he three sets 01' tot..3.1- retirements

0

reti.rements ~

casualtys age and

These operations are shown on Table 2 , on which the col:umn

numbers con.tin:ue in sequence from Table 10 are copied from Columns (13) and

(14)

Col:nnns (15) and (16 ) of Table 2

of Table 10

The present worth calcul.atiorf> of Table 2 are t.he conventi.onal steps in the process of comput.i.ng annuity rates. rates are developed ,

At the bott om of this t.able these

The signiflcant feature of the table is that the annuity

rate for casualty retirements turns out to be 0.04605+, which is eq:ual to loge is} as required by theory.

(See Equation (25) ). This is the annual rate at which

chance reti.rements occur

j

as shown in the heading ofColwnn (10) of Table 1.


~12-

The annuity rates given a.t the bottom of Table 2 are next applied. to develop the yearLy mente,

6%

sinking ~ fund.

reserves for the three groups of retire-

The purpose 9f i.his ste:p i.E to ver1.fy the theoretical conclusion that

no depreciation reserve is built up by annuities cal culated. for the casual ty retirement e , 'I'ables 35 4 and 5 are depreciation reserve calculations for total retirements J' time-dependent retirements and chance retirements s respectivelyo Com~ring

(%

t he Columns

(7 ) of these three tabl es we see the. the reserve ratios

of plant , for time-dependent ca~q es (Table 4) and for a ll causes (Table 3) are

pract ically the same J while the corr esponding reserve ratios for casua.lties are pract ice. l y zero J a s would be required by theory .

The actual ratios shown on

Table 5 ar e t he resul' of rounding to cent • The char' shows .'he depreciation reserve plott ed. in thousandi3 of

dollars . Conclus ions Ret,irementE of the chance or casualty type build up no depreciation reserve in the plant ra,iix of which they may compose

8..:.1

or only a part.

The va l ue , per uni t, of a plant J all of which will. retire as casualties j remains the s ame whether it be old. or new'o

As long as it is in service " such

pl ant does not depreciate . In making estima'tes of accrued depreciat ion j or val ue , (a.s defined ) , It is unneces s ary to e iminate from the plant data that portion whose retirementa 'W'L

be the resul t of normal casua l ties.


Yr. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Balance in Reserve at Beginning of Year (1) 0.00 284.22 550.17 795·71 1,020.28 1,220.32 1,391.70 1,533.03 1,641.69 1,714.88 1,7 49. 48 1,744.18 1,698.83 1,615.37 1,494.29 1,343.44 1,167.74 977.09 782.77 595·31 427.56 285.48 175.42 97.82 48.47 20·97 7.68 2.65 $

MAKEHAM MORTALITY CURVE - AVG. LIFE 10 YEARS. 6% SINKING-FUND DEPRECIATION RESERVE FOR ALL RETIREMENTS Chan es in Reserve Durin Year 6 S.F. Annuity Rate = 0.0 5 5 9 Balance in Charges Against Credits to Reserve Reserve at Annuity Reserve Interest End of Year (2) (4) (3) (5 ) =(1)+(2)+(3)-(4) $ 0.00 $ 831.22 $ 547.00 $ 284.22 17.05 536. 784·90 550.17 527. 795.71 33·01 739 ·53 1,020.28 47.74 518. 694.83 61.22 650.82 512. 1,220·32 607.16 73.22 1,391.70 509· 506. 563.83 1,533.03 83·50 520.68 504. 1,641.69 91.98 1,714.88 477.69 98.50 503· 102.89 1,749.48 434.71 503· 1,744.18 502. 104.97 391. 73 349.00 104.65 1,698.83 499. 306.61 492. 101.93 1,615.37 265.00 483. 1,494.29 96·92 224.49 465. 89.66 1,343.44 80.61 442. 1,167.74 185.69 410. 70.06 149·29 977 .09 116.05 58.63 369. 782.77 321. 86.57 46.97 595·31 35·72 . 265. 427.56 61.53 41.27 285.48 25.65 209 25.81 175.42 153. 17·13 14.87 103. 10.53 97·82 48.47 7.78 5.87 63 34. 2.91 20·97 3.59 1.26 16. 7.68 1.45 0.46 6. 2.65 0.51 0.02 0.16 0.17 3.

TABLE 3 Average Ca;2ita1

Ratio

(6)

~)-

$ 9,727 9,185 8,654 8,131 7,616 7,105 6,598 6,093 5,590 5,087 4,584 4,084 3,588 3,101 2,627 2,173 1,7 47 1,358 1,013 720 483 302 174 91 42 17 6 2 0

2·92 5.99 9·19 12·55 16.02 19.59 23.23 26.94 30.68 34.39 38.05 41.60 45.02 48.19 51.14 53.74 55·93 57.64 58.77 59·38 59·11 58.09 56.22 53.26 49·93 45·18 44.17 1.00


M.AKEHAM

MORTALITY CURVE - AVG. LIFE 10 YEARS

6% SINKING-FUND DEPRECIATION RESERVE

Yr. 1 2 3 4 5 6 1 8 9 10 11 12 13 14 15 16 11 18 19 20 21 22 23 24 25 26 27 28

FOR PLANT FAILED FOR PHYSICAL CAUSES; (TIME-DEPENDENT RETIREMENTS) Chan es in Reserve Durin Year Balance in Charges S.F. Annuity Rate = 0.039 0 1 Reserve at Balance in Credits to Reserve Against Beginning Reserve at Average Interest Reserve Annuit~ of Year End of Year cafital (2) (4) (1) 0) 6) (5) =(1)+(2)+(3)-(4) $ 284.28 $383.28 $ 99.00 $ O~OO $ 9,727 $ 0.00 284.28 17.06 113. 361.93 550.27 9,185 128. 341.00 550.27 33.02 796.29 8,654 144. 47.78 1,020.46 320.39 796.29 8,131 300.10 161. 1,020.46 61.23 1,220.79 7,616 182. 1,220.79 1,392.01 279·97 13·25 1,105 202. 1,392.01 83·52 1,533'.52 259·99 6,598 240.09 92.01 1,642.62 223· 1,533·52 6,093 220.21 1,642.62 246. 98.56 1,715.45 5,590 200.45 269. 1,715.45 102·93 1,7 49. 83 5,087 180.63 1,749.83 291. 1,744.45 104·99 4,584 104.67 160.93 1,744. 45 311. 4,084 1,699.05 141. 38 101.94 1,699.05 327. 1,615.37 3,588 122.19 1,615.31 340. 1,494.48 3,101 96·92 1,494. 48 344. 1,343.66 89.67 103·51 2,627 80.62 1,343.66 342. 85.63 1,167.91 2,173 68.84 10.01 976.82 1,161·91 330. 1,747 976.82 306. 58.61 53.51 782·94 1,358 782.94 46.98 274. 39.92 1,013 595.84 595.84 232. 427.96 28·37 720 35·15 421.96 25.68 187. 285.67 483 19·03 285.67 11.14 11.90 139. 302 175·11 6.86 10.54 98.11 175·71 174 95· 98.11 5.89 59 . 91 3·59 48·59 48.59 21.16 1.65 42 32. 2·92 21.16 0.67 1.21 8.10 15. 17 8.10 0.24 6. 0.49 2.83 6 0.08 0.08 2.83 0.17 2 3·

TABLE 4 Ratio

%

-rrJ 2·92 5·99 9·20 12.55 16.03 19·59 23.24 26.96 30.69 34.40 38.05 41.60 45.21 48.19 51.15 53· 75 55·91 57.65 58.82 59.44 59.14 58.18 56·39 53.40 50.38 41.65 47.17 4.00


Yr.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Balance in Reserve at Beginning of Year (1) $ 0.00 -0.06 -0.08 -0.56 -0.15 -0.44 -0.28 -0.46 -0·90 -0.53 -0·30 -0.22 -0.16 +0.06 -0.14 -0.17 -0.11 +0·33 -0.11 -0.47 -0.34 -0.12 -0.22 -0.22 -0.04 -0.10 -0.33 -0.07

6%

MAKEHAM MORTALITY CURVE - AVG. LIFE 10 YEARS 6% SINKING-FUND DEPRECIATION RESERVE FOR CASUALTY RETIREMENTS~ (NOT TIME-DEPENDENT} Changes in Reserve During Year S.F. Annuity Rate = 0.0460508 Charges Balance in Credits to Reserve Against Reserve at Interest End of Year Reserve Annuit;Z (2) (4) 0) (5) =(1)+(2)+(3)-(4) $447.94 422·98 398.52 374.44 350·72 327.19 303.84 280.59 257.42 234.26 211.10 188.07 165.23 142.80 120.98 100.07 80.45 62.54 46.65 33·16 22.24 13·91 8.01 4.19 1.93 0.78 0.28 0.09

$ 0.00 0.00 0.00 -0.03 -0.01 -0.03 -0.02 -0.03 -0.05 -0.03 -0.02 -0.01 -0.01 0.00 -0.01 -0.01 -0.01 +0.02 -0.01 -0.03 -0.02 -0.01 -0.01 -0.01 0.00 -0.01 -0.02 0.00

$448.00 423. 399· 374. 351. 327· 304. 281. 257. 234. 211. 188. 165. 143. 121. 100. 80. 63. 47. 33· 22. 14. 8. 4. 2. 1. 0.0 0.00

$-0.06 -0.08 -0.56 -0.15 -0.44 -0.28 -0.46 -0·90 -0.53 -0·30 -0.22 -0.16 +0.06 -0.14 -0.17 -0.11 +0.33 -0.11 -0.47 -0.34 -0.12 -0.22 -0.22 -0.04 -0.11 -0.33 -0.07 +0.02

TABLE 5 Average cafital 6) $9,727 9,185 8,654 8,131 7,616 7,105 6,598 6,093 5,590 5,087 4,584 4,084 3,588 3,101 2,627 2,173 1,747 1,358 1,013 720 483 302 174 91 42 17 6 2

Ratio

*

0.00 0.00 0.00 0.00 0.01 0.00 0.01 0.01 0.01 0.01 0.00 0.00 0.00 0.00 0.01 0.01 0.02 0.01 0.05 0.05 0.03 0.07 0.13 0.04 0.26 1.94 1.17 1.00


85038

ACCRUED DEPRECIATION BY CAUSES OF RETIREMENTS

6%

SINKING-FUND

MORTALITY CURVE - (MAKEHAM TYPE)

10

EQUATION y(X) MEAN

= (10526) (0.955)X(0.95)1.2

LI FE

X

10 YEARS

8

('t')

0

*

6

....

CI)

a: 0 ->> a:

4

DEPRECIATION RESERVE

::>

CI)

2

o

~

o

______~______~______-L______~__-=~~____

5

15

10

AGE,

20

25

X 30

YEARS

Note: This mortal!ty curve portrays plant of which 46% will retire for causes of the casualty type (i.e., not time-dependent). This is specified by the constant parameters of the equation. No reserve builds up for these retire足 ments. The 54~ of time-dependent ("wear and tear") retirements create the entire depreciation reserve.


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