Structured Design

1
Structured Design

• SDLC
• Computer Languages
• Program Development Cycle
• Computer-Assisted Software Engineering
• Characteristics of High-Quality Software
• Basic Control Structures

2
SDLC

• Analyze the current system
• Define the new system requirements
• Design the new System
• Develop the new system
• Test the system
• Evaluate the new system

3
Computer Languages

• machine languages
• assembly languages
• general-purpose languages
• special-purpose languages

4
Program Development Cycle

• Review the input, processing, output and
  requirements
• Develop the logic for the program
• Write the program using a programming language
• Test and debug the program
• Complete the program Documentation

5
CASE

• Major objectives
• gain more control over the processes of system
  development
• improve programmer productivity
• make the programmer's job easier
• improve program quality

6
Characteristics of High-Quality Software

• reliable - producing expected results
• user friendly - easy to use for the user
• easy to modify - easy to maintain for the
  programmer

7
Basic Control Structures

• Simple Sequence structure
• Decision structure - IFTHENELSE
• Repetition (Looping) structure - DOWHILE