MODULE 4 - SOFTWARE DESIGN

DESIGN PRINCIPLE

• ·         DESIGN ! = CODES
• ·         REVIEW TO REDUCE CONCEPTUAL ERROR
• ·         DO NOT REINVENT THE WHEEL
• ·         DESIGN PROCESS SHOULD NOT SUFFER FROM ‘TUNNEL VISION’

DESIGN EVALUATION

• ·         DESIGN Q IS PEOPLE SENSITIVE
• ·         DESIGN Q IS CHARGE SPECIFIC
• ·         DESIGN Q IS UNPRIDICTABLE
• ·         MODIFICATION AND MAINTENANCE TIME MORE IMPORTANT THAN CREATION   TIME

DESIGN CONCEPT

• ·         ABSTRACTION
• ·         ARCHITECTURE
• ·         PATTERN
• ·         SEPERATION OF CONCERN
• ·         MODULARITY
• ·         OO DESIGN CONCEPT
• ·         REFACTORING
• ·         DESIGN CLASSES

FOUR DESIGN ELEMENT

• ·         DATA OR CLASS DESIGN
• ·         ARCHITECTURE DESIGN
• ·         INTERFACE DESIGN
• ·         COMPONENT-LEVEL DESIGN