Incremental Model

Any project developed with Incremental model have multiple iterations of builds which are incremented one by one to complete it. In Incremental model a project is divided into many small builds and develop builds one by one and delivery is done for each small build.

Each builds is released after completion of all its phases(Requirement Collection, Analysis, Design, Coding, Testing and Delivery). In each increment we have all phases of SDLC, so it is known as Multi Waterfall model. If any requirement is missed in the current build, there is a possibility to add those requirements in the next build or release. Every cycle or increment is repeated until customer is satisfied with the final product or application. When there is less human resource we go for incremental model.

Every increment has all phases of SDLC:

• Requirement Collection
• Analysis
• Design
• Coding/Development
• Testing
• Delivery

 

 
Advantages:

1. Incremental model is suitable for projects with less resources.
2. Results are obtained after each cycle.
3. Any functionality can be developed and deployed quickly.
4. We can add or remove builds easily.
5. Easy to test and debug because of smaller iteration.
6. Customer is interaction is more due to multiple releases. So a customer satisfied quality product is delivered at last.

Disadvantages:

1. System design issues raised because all requirements are not gathered at a time.
2. Final cost of product may exceed due to multiple changes in requirements and builds.
3. Incremental model is time taking process.