1. Software Development Models SW

3. Code & Fix Development/QA Release Requirements Advantages: -no overhead -fast Drawbacks: -no modularity -no schedule/milestones -small team/simple projects

4. Waterfall (normal) Requirements Design Development QA/Test Release Requirements Document Design Document Code Test Plans Test Cases Advantages: -large projects -well documented Drawbacks: -overhead -slow

5. Study project model Concept Specification Prototyping Evaluation & Analysis Engineering Project (Standard Waterfall Model) Report

6. Milestone build model Requirements (Build #1 Functionality) Design (Build #1) Implementation (Build #1) Testing (Build #1) Requirements (Build #2 Functionality) Design (Build #2) Implementation (Build #2) Testing (Build #2) Requirements Design Development QA/Test Release Milestone Build1 Milestone Build2 Waterfall Concept Advantages: -software enhancements projects -risk reduction Drawbacks: -overhead

7. Waterfall/Spiral hybrid Requirements Design Development QA/Test Release Requirements Document Design Document Code Test Plans Test Cases Advantages: -risk reduction Drawbacks: -overhead

8. Waterfall with subprojects Requirements Design Development QA/Test Release Requirements Document Design Document Code Test Plans Test Cases Module1 Development QA/Test Module2 Development QA/Test Module3 Advantages: -faster than normal wf

9. Waterfall with overlapping Requirements Design Development QA/Test Release Requirements Document Design Document Code Test Plans Test Cases Advantages: -faster than normal wf (overlap phases)

10. Evolutionary prototype Requirements Design Development Release Requirements Document Code Design Document Design/build a prototype, then make further developments

11. Staged delivery Requirements Design Development Alpha Release Requirements Document Design Document Code Test Plans Test Cases QA/Test Beta Release QA/Test Final Release Advantages: -reduce QA time/costs

12. Sequential development Requirements Design Development QA/Test Release Requirements Document Design Document Code Test Plans Test Cases Development Development QA/Test Release QA/Test Release -work upon several releases in the same time

13. Spiral Design Development QA/Test Release Requirements Design Development QA/Test Design Development QA/Test Design Development QA/Test Design Development QA/Test -complex projects -slow development time

14. Incremental Development Requirements Design Architecture Specify Increment Design/Build Increment Test/Validate Increment Integrate Increment Validate application Complete ? Deliver application -conservative -slow development time

15. SW Development model comparison