The incremental mode is an intuitive approach to the waterfall model. Multiple development cycles take pace during development, making the life cycle a “multi-waterfall” cycle. Cycles are divided up into smaller, more easily managed iterations. Each iteration passes through the requirements design, implementation and testing phases.
A working version of software is produced during the first iteration, so you have working software early on during the software if cycle. subsequent iterations build on the initial software produced during the first iteration.
Advantages
- Generates working software quickly and early during the software life cycle.
- More flexible – 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.
- Every iteration in incremental model is an easily manged milestone.
Disadvantages
- Each phase of an iteration is rigid and do not overlap each other.
- Problems may arise pertaining to system architecture because not al requirements are gathered up front for the entire software life cycle.
