Cambridge Nationals IT Revision Guide and Workbook

Page 22

Types of design tools 1

see p. 71

What you need to know •

The components of a flow chart

When it is best to use a flow chart.

A flow chart is a design tool that shows a clear path of how you are going to achieve the intended product. It can be created in word processing software, drawing packages or specialist flow chart software.

Flow chart

This is the Terminator shape and is at the beginning and end of every flow chart.

PL E

This is often used to show processes, workflows and decisions. Different shapes are used to identify various points in the process.

This is the Process shape and shows when something is taking place in the flow chart.

Start

Step 1

This is the Decision shape where the user has to make a choice; there can only be two choices: Yes or No.

Step 1

Decision

All flow charts use arrows as this shows the direction you need to take.

M

Answer

A flow chart can have more than one End depending on how many decisions it has.

SA

Advantages •

It is good at showing a clear route of how you are going to create your product. It helps with organisation as it is logical.

This is the Input/Output shape and shows when something is being added or extracted from the project.

End

Disadvantages

Too many options make it complicated and difficult to understand.

Revise it!

Remember it!

Create a set of revision flash cards for each design tool as you revise, starting with flow charts. Include:

Each shape on a flow chart has a specific role.

Most common computer software can be used to create a range of design tools.

Each tool has something it cannot be used for, e.g. a flow chart can’t be used to present an idea.

the purpose of the design tool

an example of the design tool

a description of the design tool

the advantages & disadvantages of the design tool.

20

Revision Guide

Original material © Cambridge University Press 2022. This material is not final and is subject to further changes prior to publication.


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