The Waterfall Model is a sequential development approach introduced by Winston Royce in 1970 where each phase of software development - requirements, design, implementation, testing, integration and maintenance - follows in a linear sequential order. The Waterfall Model provides structure but has limitations as it does not allow for any feedback or overlapping phases and is therefore not suitable for complex projects with changing requirements.

1. WaterFall Model
BY
K DIVYAVANI

2. What is Waterfall Model?
 Winston Royce introduced Waterfall
model in 1970
 Classical Waterfall Model/Linear
Sequential Model.
 Developed in sequential approach.
 Each phase is interlinked.
 Provides structure.

3. When to use?
 Requirements are well defined.
 Product definition is stable.
 Technology is understood.
 The project is short.
 New version of an existing project.

4. Classical Waterfall Model Diagram

5. ADVANTAGES
 Easy to understand.
 Individual process.
 Properly defined.
 Clear milestones.
 Properly documented.
 Reinforces good habits.
 Works for short projects.

6. DISADVANTAGES
 No feedback path.
 Difficult to accommodate change requests.
 No overlapping of phases.
 Limited flexibility.
 Limited stakeholder involvement.
 Late defect detection.
 Lengthy development cycle.
 Not suitable for complex projects.

7. Thank You.