Function oriented design

Function-Oriented Design Module 3 Sangeetha Jose Lecturer in IT, Govt. Engg. College Idukki

Design ,[object Object],[object Object]

Different levels… ,[object Object],[object Object]

Design methodology ,[object Object],[object Object],[object Object]

Object Oriented Design vs Function Oriented Design ,[object Object],[object Object],[object Object]

Design Objectives ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problem analysis Vs Design Principles ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Design Principles ,[object Object],[object Object],[object Object],[object Object]

Problem Partitioning and Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Abstraction ,[object Object],[object Object]

Contd… ,[object Object],[object Object],[object Object],[object Object],[object Object]

Modularity ,[object Object],[object Object],[object Object],[object Object]

Top-Down vs Bottom-Up Design ,[object Object],[object Object],[object Object],[object Object],[object Object]

Contd… ,[object Object],[object Object],[object Object]

Module ,[object Object],[object Object],[object Object]

Module-Level Concepts ,[object Object],[object Object]

Coupling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Contd… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cohesion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Levels of cohesion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Details… ,[object Object],[object Object],[object Object],[object Object]

How does one determine the cohesion level of a module? ,[object Object],[object Object],[object Object],[object Object]

Design Notations ,[object Object],[object Object]

Structure Charts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The structure chart of the sort program

Supports Iteration and Branching

Types of Modules ,[object Object],[object Object],[object Object],[object Object],[object Object]

Design specification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Structured Design Methodology ,[object Object]

Factoring ,[object Object],[object Object],[object Object]

SDM Strategy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Step 1: Restate the problem as a data flow diagram ,[object Object],[object Object],[object Object],[object Object]

Example 1: DFD for an ATM Back

Example 2: DFD for a word-counting program Back

Step 2: Identify the input and output data elements ,[object Object],[object Object],[object Object],Figure1 Figure2

Step 3: First-Level Factoring ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Example 1: First-Level Factoring of word-counting example

Example 2: First-Level Factoring of ATM example

Step 4: Perform Additional Factoring ,[object Object],[object Object],[object Object],[object Object],[object Object]

Example: additional factoring of the word count program

Contd… ,[object Object],[object Object]

Design Heuristics ,[object Object],[object Object],[object Object],[object Object],[object Object]

Verification ,[object Object],[object Object],[object Object]

Design Reviews ,[object Object],[object Object],[object Object]

Metrics ,[object Object],[object Object],[object Object],[object Object],[object Object]

Metrics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Network Metrics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Stability Metrics ,[object Object],[object Object],[object Object],[object Object]

Information Flow Metrics ,[object Object],[object Object]

Approach 1 ,[object Object],[object Object],[object Object],[object Object],[object Object]

Approach 2 ,[object Object],[object Object],[object Object],[object Object]

Classification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Function oriented design

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