1. PROGRAM DESIGN CONCEPTS AND TECHNIQUES
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming : Unit 1 Slide 1

2. Objectives Describe the system development life cycle.
List the benefits of structured programming.
Identify the three basic control patterns.
Identify the symbols used in creating a flowchart.
Create a flowchart that describes a sequence control program.
Create an algorithm that describes a sequence control program.
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 2

3. System Development Life Cycle (SDLC)
Analyze the current system
Define new system requirements
Design the new system
Develop the new system
Implement the new system
Evaluate the new system
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 3

4. Program Development Cycle (PDC)
Review input, processing and
output requirements
Design the logic
Write code
Test and debug
Repeat
Document
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 4

5. Structure Chart Order Entry Program A000 Get Order Info B000
Process Order
B010
Verify payment
C000
Remove from
Inventory
C010
Generate
shipping
label C020
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 5

6. Class Diagram Customer Order OrderHead OrderDetail LineItem
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Structured Programming: Unit 1 Slide 6

7. Control Structures If Then Else Simple Sequence If condition Input
DoThat
DoThis
Process A
Loop
Process B
condition No
DoThat
Output
Yes
DoThis
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 7

8. System Flowchart Sales Data Weekly Sales Program Weekly Sales Report
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 8

9. Program Flowchart Start Read RegSales, SalesSales Regcom =
SalesCom =
SalesSales *.03
Pay =
RegCom+SalesCom
+ 200
Write
Pay
Stop
11/13/2018© 2006 ITT Educational Services Inc.
Structured Programming: Unit 1 Slide 9

10. Summary In this unit you learned:
The benefits of structured programming.
The steps in a program design cycle.
The methods of designing a program, including:
Algorithms
Structure charts
Class charts
Flow charts
The three basic control structures:
Sequence
Conditional
Loop
The ways to test a program's design
Informal design review
Structured walkthroughs
Desk checking
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Structured Programming: Unit 1 Slide 10