CostEstimate

Page 1

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ภภภCost Estimation

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ภภภภ! " #$" % & ภ' " ภ( ภ$ภ&) " * $ % ! + ภภ' ( , '%-' .&/ ! $ ภ+ $ ( "ภภ(Specification)

! " ภภ* ภ' ภ! $ " % & + ภ! ( ภ$ + #$" -

ภภภCost Estimation

.

ŕ¸

1) ภภภ(Owner) 2) "# ภ$%% & ' ภ(Designer or Architect) 3) "# % ŕ¸

(Project administration consultant) 4)"# :% ; ภ(Construction management) 5)"# >% ; ภ?>ภ(Main contractor) 6)"# >% ; ภBB B (Sub contractor) 7) (Worker)

ภภภCost Estimation

.

2. %&' ( ก ( )* % 2.1 ก % & " ? (? (ROUGH OR TENTATIVE ESTIMATING) 2.1.1 ( L ก % & " 1. ก % & RULE OF THUMB OR CONCEPTUAL ESTIMATING 2.ก % & PRELIMINARY ESTIMATING ( L " " # ? 3.ก % & COMPARISON ESTIMATING #$" " " ก ก ' "? ก " ' ( ก ก ก Cost Estimation

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2. ก ! " #

2.2 ก

(DETAILED ESTIMATING OR QUANTETY TAKE-OFF) 2.2.1 ,-./0 /1/ก

2 1. 3 3 /, ,0, 42 4ก

2. 5 6 7 ก

3 3. 4 9 - 6- : : ;< 4 / 4. : 4 /3>ก? < 43-.4: 6 ก 2 5. 1A< -A > < 4 6. 1A< 4 /5 CD: E 4 /3 F1:G SUBCONTRACTOR 7. 1A< 3 F7;GA<4, 4: E SUPPLIER 8. 9 / M D 4 / .9

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11. 0 EF/

; ก ก ก Cost Estimation

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3. , ( ' ' * ภ% ภ% 1. ( $. ' " ' T UVภ#'ภ' " ' 2. ' " ' 3. / !$ WX ภT 4. ภ" ภ' %! ภ( $. ! Z* 5. ภ+ ' ( (' ! , ,( Z* 6. $ ภ*" ภZ* ภ$ % & ( ŕ¸

ภภภCost Estimation

.

ภภ- . ( Estimator ) - ( ! * V $ & T )$

- '% ภ$ $

- '% ภภ! ( '% ' % ' ! $ ( $. . ภ&) - TZภU / ! ($' * (" ภ" $

- ภภ, '$ . ภ( " + '% ( ' "

ภภภCost Estimation

.

5. " ภ: ภ- . 5.1 ( $.ภ5.2 5.3 " ภ$+ / U '%ภ+ " ภ$+ 5.4 . ภ&) '% + ŕ¸

ภภภCost Estimation

.

Process In Construction [1] Initiating

[2] Planning [3] Executing process

[4] Monitoring & Control [5] Closeting Process

ภ# ภ(Project Definition) ภ( - # ภ(Project Planning) ภ$+ '%ภ$'+ $ # ภ(Project Scheduling) ภ$ '% ( . # ภ(Project Monitoring & Control) ภ% '% # ภ(Project Evaluation & Termination)

: [1] Initiating : [2] Planning : [3] Executing process : [4] Monitoring & Control : [5] Closeting Process

567 88 ภ9 : 8 . ภภ% / ภภภ'. ? $ $ * - ภ! ภT " ( Residential Construction ) - ภ! L. ภภ( Building Construction for Business ) - ภ$ n L & #/ ( Heavy Engineering Construction ) - ภ$ . ภ( Industrial Construction )

ภภภCost Estimation

.

! ภภภ" # ( Owner )

( Professional Construction Manager ) ( Architect / Interior /Engineer ) [1] Initiating [4] ( Contractor ) Monitoring & Control

[2] Planning [3] Executing ( Contractor ) process ( Sub-Contractor ) [5] Closeting Process

' ภ' ภภ- . - # ภ( Owner ) - - ภ'% ZภU ( Architect / Engineer ) - - ภ' ภ( Contractor ) '%- ( ( Sub-Contractor ) - - ภ( Professional Construction Manager ) ภภภCost Estimation

.

6. )::)* *(ภL ภ% ŕ¸

ภภภCost Estimation

.

ภTZภU ) %ภภ% & ( $. 1.1 + ภ$ ภ$ *

"'% "$ ภ"(ภ$ $ ( ( * - + ภ% & + ( Z ภ! Z + ภ$ ! % % r " Z + ภ$ ! '$ $ sZ % -' " ภ% &

ภภภCost Estimation

1.2 ภTZภU "ภภSpecification "'% "$ nn ภภsZ - + ภ% &ภ! & Z ( '% "$ "ภ%ŕ¸

'% " % "$/ " ภ$ " "ภ* ? - % &ภ" - ภ! ,

.

ก TZกU ) %ก ก % & ( $. 1.3 ก TZกU Z ก % ( ก ก + '+ $ ก + ก ' '+ $ ก + * ก ก + T " ( "( n t! %$ % + * * $ $ ก + ก $ W ) ) ( $. ก % ก $ * ก + . - + ก % ก ( + $ * Z ก ก ! "ก ( ก % $ ! $ (' ( ( $. * 1.4 "'% "$ ( $. ก + ก TZกU Z ( $. + ก $ ( %ก ! %ก '% $ * $ "'% "$ ( TZกU $ ก $ $ ( ( $. '($' " ( * ( L ก "( $. ก $ (" W. - * ก ก ก Cost Estimation

.

ก TZกU ) %ก ก % & ( $. 1.5 ( L ก $ก % & - % & + ก TZกU '% "ก % + ก % & "ก "ก ( $. '% + ( ( $. % $ + ( / (" '% (

'% "ก ( 1.6 ก & + ก $ $ $ ( $ n " ( $. sZ ( $. * - -' " & ก' - - + ก % & + ก $ $ & ' ( % $ ' ก ("( $. + ก $ ( $. * ( + ก $ "ก ( " ( n " - + ก % & ( + ก $ - ( $. n " ก ก ก Cost Estimation

.

ก - ก- . 2.1 ก % & ก ก ก % & ก

'% ' ก ก ! ก ! & $ - + ก ก '% ! ก ( ก "(ก ก % . ก * ? ' ( , $ (" %#" ) ก * ก % + $ #$"( L ก $ + (& ก' ( L % & #$"'% "$ ก % & ก '% ' ก ก $ ก' ( #$" t! % " " u กx % " '% ก

ก ก ก Cost Estimation

ก. u &% V ( ก "(ก ก % & . u + ก % ( ( ก v ( ก "(ก ก % & . u V ก ( ก "(ก ก % & . u % " + ก "ก V

( $ ("ก ! $.v ( ก "(ก ก % & . u ' ก ก&w) &%ก ก ก' ก+ $ (

.

ก - ก- . ' ก ก&w)ก + (& ก' '% ก %ก ก %ก T %ก($ V " " ก - ! % + ก ก ก % & ก+ $ ก' ( ก' * ( $. Factor F ./ &w)

'% + ก' $ + Z* ( % T ก ก + ก ( - $ ก $ * &%ก ก ก+ $ ก' ( ! $ ก' r . .ก &) '% '%

ก ก ก Cost Estimation

$ * &%ก ก ก+ $ ก' Z* #$" ( ก ก+ $ ก' ก ก '%ก ก nTZกU ( u ก '$ ! "ก ( ก . ! &%ก ก ก+ $ ก' ก nTZกU

* Z* - $+ ก

.

ภ- ภ- . :). ภ(. M ( BOQ = Bill of Quantities )

1. &( $. + ภ' '$ ! "'% "$ &( $. '% ( $. ! ภ' $+ ภ$ 2. ( $. $ ภ( $. $ ภ! & ") ( $ 3. $ ภn % + ( $ * ? 4. " ? ( Factor F %ภ$ (" + ("ภ, ( - -( ,$ ภ"* ,ภ+ ,/ U ) $ ภภภภ+ $ ' ภภ&w)ภ+ (& ภ' ภภภ5. ./ &w) %ภ( ) $ ภn ภ+ $ V ภnTZภU ภ&w) + ./& w) + (ภ' ภFactor F ' ( ภภภCost Estimation

.

ก - ก- . ( L $ + ก' ก '% ' ก ก * 1 " ก TZกU + ( ก "(ก '% "ก ก ' ก * 2 ก $+ 2.1 % &ก & '%( $.ก 2.4 % &ก (" (" ' ( x $ (" + ( (1) % &ก n ( %ก &( $. (2) % & "ก % / 2.5 ( + ( ( $. (3) - & '%( $. ก&w) ก+ $ 2.6 ( " $ ( $. '% 2.2 ก ก' n

$ & '%( $. * $ ก #$" " '+ $ n ( %ก 2.7 % &ก + ("ก '% 2.3 % &ก ( $. + ( $. $+ #$" $ ) s, ) ( $. (" ก n ( $. ก ก' ( $. '% (" ' ( x $ (" + ( &( $. + -' $ ก ก' + ( ( $. ก. ก :ก . Cost Estimation

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ก - ก- . ( L $ + ก' ก '% ' ก ก 2.8 % &ก ก+ #$" $ ) s, ) ( $. '% 2.9 ( ( $. '% + ("ก '%$+ '%ก+ 2.10 % &ก / U ก #$" $ ) s, ) ( $. '% + + ("ก '%$+ + ก+ 2.11 . ก = ( $. '% x ( + ("ก '%$+ + ก+ + / U ก ) = FACTOR F + ./ &w)

ก ก ก Cost Estimation

.

ภ" # #9 ภ9 : 8 6- 39 ภ4 < ภ< A G 4 A F4 ;ภA G 4, 43 4 Sŕ¸

0 4 A 4 ภ9 / : < -A > 0< :/< , 44 /ภ< A G 4

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69 / /

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: :0>

9.14 7/-4 >ŕ¸

E. 4 U E A ,/ 8"x10" - ŕ¸

E. 4 U A 8"x10"(20+3 7</) - ;/U /0Y7A (Silica Cement) - ;/U /0Y, / - 3 - /.9 7A ;/ - WAX

7/-4 >ŕ¸

E. 4 U A 8"x10"

ภภภCost Estimation

23 7</

6.25

143.75

18.00 ภภ.

2.08

37.44

ภภ. . . 0

ภภ.

5.47 292.50 0.0144 150.00

1.37 11.70 0.09 3.00

0 . .

=

197

0.25 0.04 6 0.02 1

.

*

ภ" # #9 ภ9 : 8 6- 39 ภ4 < ภ< A G 4 A F4 ;ภA G 4, 43 4

Sŕ¸

ภภภCost Estimation

.

ภ- ภ- . ( L $ + ภ' ภ'% ' ภภ( " $ $ 1"x8" " ( 10 $ = 1x8x10x0.0228 = 1.824 ' ภTภ)W.  $1/2"x6" ภ',$ * '% s ภ',$ ภ1 1/2" ( $ 1 1/2"x3" ( ภ0.50 . ( ( $ "() * 1 ( $.$ * ( - ( $. " " ' ()  = 0.725 ' .W. ( = 0.25 ' .W % = 0.15 ภภ.

ภภภCost Estimation

.

ภ- ภ- . ( L $ + ภ' ภ'% ' ภภ ( $. - + , $ $ ? $ $ "(  ( $. - + , $ $ ? ( $ 1 1/2"x3" ( ภ0.40x0.60 . 2 $ ( $ 1 1/2"x3" ( ( 2 ) * 1 . . ( ภ0.40x0.60 . ( ( 2 ) * 1 . . ( $.$ * ( - ( $. " " ' () ( $. - + , = 1 . . ( $.$ * ( - ( $. " " ' () ( = 0.48 ' .W. ( $. - + , = 2 . . % = 0.20 ภภ. ( = 0.48 ' .W. % = 0.25 ภภ.

ภภภCost Estimation

.

ก " # #9 ก9 : 8

ก ก ก Cost Estimation

.

ก " # 8 # D5 EF

ก ก ก Cost Estimation

.

ก " # 8 # D5 EF

ก ก ก Cost Estimation

.

3.1 ภ% " M - - ภ% ภภ- . 1.

( $. '% . " (Direct Cost)

2. " ภ$+ ภ" (Indirect Cost)

ภภภCost Estimation

.

3.1 ภ# HFI: 6D I9 H 9 ภJภ"ภ9 : 8 1. < -A > < 4 f/ < 4 /0G/3>/ : E < 1SG6< 3 40 4 (Direct Cost) < -0j> 3 F1SG1/ภ7 0

0G/3>/ k (Prime cost)

< 43 F1SG1/ภ7 0 0G/3>/ < 1SG6< (Cost ภ- Expense) f/ n66- 1/ภ7 0 0G/3>/ 6 A E / < ภ1SG6< 4 /3>/A9 : - ภO G UlF4A /3 -5 Y3 F -4 4 ; < G < 6 O G1SGA /3 -5 Y/-./1/ภ7 0O G 4 G S</ < 3 F / < ภ< A G 42 44 / < EF 46-ภ> ภY A< / < 1SG6< -ภ6 : jl4 4 /3>/3 Fj;ภ1SG6< ภ- A F43 F: O ภ- ภ7 0 S</ < -0j> < /.9 < Oo ภภภCost Estimation

.

< -A >0< :/< = -A >

ภ0< 4 ? x 0< :/< , 4 -A > : < /-./

< -A >0< :/<

ภภภCost Estimation

S/ -A > 69 / /

.

( $. (" = &( $. %ภ? x (" ( $. ' * - # * , ภ.- ( $ ภs % V @ 0.15 $! * 4 X 2.5 "ภ( $. 1. # # ( * , $ 11/2„x3 2. $" 4 . 3. $ ภ4 . s % ( 4. % '%' ภ% ' 5 . - ภn "( $.

ภภภCost Estimation

.

9 - 3 F

ŕ¸

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/:/< ( 3)

: :0>

1

2 4 < O G /E. ,p41A ,/ 1-1/2"x 3"

3< /

300.00

2.5 0

2

2 4 < O G 41A ,/ 1-1/2"x 3" O G - 43 .

400.00 220.00

2.5 0

3

3< / 7</

4

O G - 44 .

7</

250.00

5

O G - 46 .

7</

350.00

6

O G - 410 .

7</

440.00

7

O G - 415 .

7</

740.00

8

O G - 420 .

7</

750.00

9

O G - A-ภ- M; , :/ 4

7</

450.00

ภภภCost Estimation

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

.

9 - 3 F

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:/<

/:/< ( 3)

: :0>

10

O G - A-ภ- M; , :/ 6

7</

650.00

1.20X2.40 0

11

O G - A-ภ- M; , :/ 10

7</

825.00

1.20X2.40 0

12

7</

1,230.00

1.20X2.40 0

13

O G - A-ภ- M; , :/ 15 p Y 15 .

7</

700.00

1.20X2.40 0

14

p Y 20

7</

850.00

1.20X2.40 0

15

0 ;

0 .

13.00

16

< 4A 5</

0

1,500.00

17

< 4A G

0

2,000.00

18

< 4S< 4O G

0

3,000.00

ภภภCost Estimation

.

ภ$( $. &( $. ( 1 ) - 1.20X2.402.88 = I 8 "I ( $. 1 ภ250/2.88= 86.85 : ภภ$ 4 x2.5 4.00X 2.50X86.85= 868.056

ภภภCost Estimation

.

%&'ภV ภ(. M ' ! %

( " ภ$ & $ & 4 .00X2.5 ภภ$

$1 - - '% 250 X 5 - =1,250 ภภภCost Estimation

$ * $ + ( 5 -

.

ก $( $. 4.00X 2.50X86.85= 868.056 ( L ก $ ก ( 1 ) - ) - * 250 X 5 ) - = 1,250 :. $

. " ก ก ก Cost Estimation

.

M - ) direct labor cost '$ -'-' ภ+ ( Zภ-' + $ ( ( ( / " )ภ+ ( (# ( " ภ' ( ( ( CSI

% Zภ-' + $ (

ภ'% 1500 W ) ) + " ( 5 $ $ ภ5X1500 =7500

ภภภCost Estimation

.

ภ$ . ภV n 1/2 - -'-' =8 . / :( ภVt = 280 / :( ภV (" =280/8 =35.0 / . (ภ" ? ภ"(ภ20% =7.00 / .

35.0 + 7.00 =42.00 ภV Z - . = 42.00 / . ภภภCost Estimation

.

- ( VM %: )* - ) (Indirect material and indirect labor cost) ( .$ '% ( .$ '% $ ภ-' #$" $ ภ-' '" ( .$ ภs + . s s . ภ&) ภ" ? ภ"(ภ$ ภ%ภภ. $ ( Z ( $ ภ. ภ&) '% + ภ( " !' ( . ภ‡ ภ% ˆ ',ŕ¸

ภภภCost Estimation

.

( ภ'% ภ',ภ'+ ' " .$$ $ $ $$ " $ ! " $ "(ภ, " " s * " ภ, Zภs s *+ * !' *+ ' ' '%ภ% WWX

ภภภCost Estimation

.

3. - . M (Burden Overhead cost) " ภ$+ "ภ( ( # . "$+ / U

'%ภ+ " $( % ภ$ Z* ภภ" ภภ$+ ภภ- sZ % u

nn " ภ$+ % ภ" Z* " ภ' ภU&% ภ" nn ภ" ภภ" ภ" ŕ¸

4 L 10 % ภภภCost Estimation

.

3. - . M (Burden Overhead cost) ( L ภ+ (& t' " . # . " '% ภ( + (& ภ# ." ภ+ ( + (& ภ# ." ภ#$" + (& ภ# ." ภ. V

ภภภCost Estimation

.

4. "! TU ก+ $ " ก ก + $+

ก ก+ ก ก+ ก ก+ ก ก+

ก ก " ก

$ .& - ( . $ ! ( ' $/ " $ + - ก '% "$$ (" % C.P.M $ ZกU - ( . - (

ก ก ก Cost Estimation

.

ภ$ + ภ%ภภ% & $'+ $ (" " ภn

$ & ( $. '% (Bill of Quantities) ( $.ภ' '$ * ภ$ + ภภ' ภ% & ภภ(" ( ( ' '% ภ? $ " ($ '% ( ( '

:(Z!'). % [ - (. M )* - ) (B.O.Q.) ภภภCost Estimation

.

:(Z!'). % [ - (. M )* - ) (B.O.Q.) n $ ( . . ภCost Control

$ . ภ$

$ $ " " . ภ% & * ( Control . '%# ภ$ * Budget Š '$ ! '% " ? ! "ภภ( '% ( % ) . " $ Zภ"'% "$ " " % . ( $. '% & '% " " $ Zภ"'% "$ ' ภ" " $ ' "? %$ ภภภCost Estimation

.

ภ6- 39 BOQ3>/(1

ภ1SG -A > < 4) 0- < 4 -rS A 4 /E. 4 / 9 -

ŕ¸

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< ภ< A G 4 E. 40G/ < 9 / /ภภ9 O

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< ภ< A G 43-.4A ./ ภภภCost Estimation

.

f/ 4 /

ก 6- 39 BOQ3>/(1

ก 1SG -A > < 4) 9 -

4 /FINISHING 4 /5E./O GA9 p6 ; 4 /5E./ ก

- 2 4 : pก ;VIVA BOARD B 4 /

4 /

Ooou 4 /

- ก C 4 /

A>, M C 4 /0ก 0<4 4 /7/-4 4 /0ก 0<47/-4 4 /

0; EF / CASHIER D 4 / FURNITURE BUILT IN E 4 / FURNITURE 0- 0 3-.4: F 4 / SIGN & DISPLAY

< ก< A G 4 E. 40G/ < 9 / /ก ก9 O

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ก ก ก Cost Estimation

0 . . 0 . .

.

ภJ 6O P# 8 : 8ภJภ" O 8

(Work Breakdown Structure, WBS)

6 ภ, ,02 4ŕ¸

ภ6ŕ¸

f/ 7/7-4 A 4ภ:Yภ6ŕ¸

3 F0G 439 9 - , 4ภ6ŕ¸

; ภ, / (2 4ภ)

- < 3 FA> 3 F f/ Work package 6 -ภD f/ 7/M; ภO G <44 /1/2 4ภภf/: ? < 4O EF ? 0 : : ;<

3 / , 44 / ภภภCost Estimation

.

ภJ 6O P# 8 : 8ภJภ" O 8

(Work Breakdown Structure, WBS) -0j>

A4 Y, 4ภ1SG2 4A G 4ภ6- ภ,G ; 1.ภ9 :/ , ,0, 4ภ1:G ภA9 : - 4 /ภ< A G 4 < 4

2.1:G: -ภภA G 4

1/ŕ¸

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3 F1SG1/ภภ< A G 4 3.1:G: -ภภ1/ภ6-

ภ6- ภp ,G ; ŕ¸

4 /,G ; A9 : - 7;G :

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M30< 4 ?ŕ¸

6- <4,G ; 4 /ภ< A G 4

ภภภCost Estimation

.

ภJ 6O P# 8 : 8ภJภ" O 8

(Work Breakdown Structure, WBS) ภA G 4 2 4A G 4ŕ¸

4 / (WBS) yภ9 :/ ภ6ŕ¸

: -ภy ภ< f/ภ>< 4 / (Work Package) y ภ< 4 f/4 / (Work Unit) yภ9 :/ :-A, 4ภ6ŕ¸

0< 4 / 5EF 1SG1/ภA G 4 ภ6ŕ¸

/-./?

ภภภCost Estimation

.

ภJ 6O P# 8 : 8ภJภ" O 8

(Work Breakdown Structure, WBS)

ภภภCost Estimation

.

ภJ 6O P# 8 : 8ภJภ" O 8 (Work Breakdown Structure, WBS)

ภภภCost Estimation

.

ภJ 6O P# 8 : 8ภJภ" O 8 (Work Breakdown Structure, WBS)

ภภภCost Estimation

.

ภ6ŕ¸

ภ/-ภA /

33 F 4 ŕ¸

4 / o Y/ 6 Y /Y /

ภภภCost Estimation

.

ภ6ŕ¸

ภ/-ภA /

33 F 4 ŕ¸

4 / o Y/ 6 Y /Y /

ภภภCost Estimation

.

9 - 3 F 1 2 3 4 5 6 7 8 9

2 4 < O G /E. ,p41A ,/ 1-1/2"x 3" 2 4 < O G 41A ,/ 1-1/2"x 3" O G - 43 . O G - 44 . O G - 46 . O G - 410 . O G - 415 . O G - 420 .

3< / 3< / 7</ 7</ 7</ 7</ 7</ 7</

/:/< ( 3) 300.00 400.00 220.00 250.00 350.00 440.00 740.00 750.00

O G - A-ภ- M; , :/ 4

7</

450.00

ŕ¸

ภภภCost Estimation

:/<

: :0> 2.5 0

2.5 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

1.20X2.40 0

.

9 - 3 F

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10

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650.00

1.20X2.40 0

11

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7</

825.00

1.20X2.40 0

12

7</

1,230.00

1.20X2.40 0

13

O G - A-ภ- M; , :/ 15 : > -

-

;<

15.00

1.20X2.40 0

14

/3- jG

;<

50.00

15

0 ;

0 .

13.00

16

< 4A 5</

0

1,500.00

17

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0

2,000.00

18

< 4S< 4O G

0

3,000.00

ภภภCost Estimation

.

ภ6ŕ¸

ภ/-ภA / 33 F 5 ŕ¸

4 / o Y/ 6 Y /Y / G 3 / ภj -A >

ภภภCost Estimation

.

ภ6ŕ¸

ภ/-ภA /

33 F 5 ŕ¸

4 / o Y/ 6 Y /Y / G 3 / ภj -A >

ภภภCost Estimation

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3. ::: % ภ- . (Construction Management; CM) ': %L( CM ' *(ภภ: % )* ( ภภ([ ) - % (Conceptual Phase) ภ(

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