The document discusses different software development models including the waterfall model, incremental model, and spiral model. The waterfall model is a linear sequential process that consists of phases like requirements, design, implementation, testing, and maintenance. The incremental model generates working software in iterations allowing for more flexibility compared to the waterfall model. The spiral model iterates through requirements, design, and prototyping in risk-assessed phases.

1. Software Development Models MuwaffaqSalman ShanatanuTyagi Brian Simmons Mark Quinn

2. Software Development Process A software development process or life cycle is a structure imposed on the development of a software product There are several models for such processes Each model describes approaches to a variety of tasks or activities that take place during the process.

3. Some Development Models Waterfall Model Incremental Model Spiral Model

5. It is a linear and sequential software development process

6. It consists of phases such; as 1)Requirements analysis, 2)Design, 3)Implementation, 4)Testing, 5)Installation, 6)Maintenance

8. Disadvantages of Waterfall Model It is seen as somewhat unrealistic and unsuitable for the real world because of it’s upfront requirements Inflexible as it’s difficult revisit phase once it’s completed phase Costly to change scope and requirements

9. Incremental Model

10. Advantages of Incremental Model Generates working software quickly and early during the software life cycle More flexibility – less costly to change scope and requirements Easier to test and debug during a smaller iteration Easier to manage risk because risky pieces are identified and handled during its iteration Each iteration is an easily managed milestone

11. Disadvantages of Incremental Model Each phase of an iteration is rigid and do not overlap each other Problem may arise pertaining to system architecture because not all requirements are gathered up front for the entire software life cycle

12. Spiral Model

13. Advantages of Spiral Model

14. Disadvantages of Spiral Model