Incremental Model is a process of software development
where requirements divided into multiple standalone modules of the software
development cycle. In this model, each module goes through the requirements,
design, implementation and testing phases. Every subsequent release of the
module adds function to the previous release.
The process continues until the
complete system achieved.
Then he started building it and in the first
iteration the first module of the application or product is totally ready and
can be demoed to the customers.
Likewise in the second iteration the other module is
ready and integrated with the first module. Similarly, in the third iteration
the whole product is ready and integrated. Hence, the product got ready step by
step.
The various phases of incremental model
are as follows:
1. Requirement
analysis: In the first phase of the incremental model, the product
analysis expertise identifies the requirements. And the system functional
requirements are understood by the requirement analysis team. To develop the
software under the incremental model, this phase performs a crucial role.
2. Design &
Development: In this phase of the Incremental model of SDLC, the design
of the system functionality and the development method are finished with
success. When software develops new practicality, the incremental model uses
style and development phase.
3. Testing: In
the incremental model, the testing phase checks the performance of each
existing function as well as additional functionality. In the testing phase,
the various methods are used to test the behavior of each task.
4.
Implementation: Implementation phase enables the coding phase of the
development system. It involves the final coding that design in the designing
and development phase and tests the functionality in the testing phase. After completion
of this phase, the number of the product working is enhanced and upgraded up to
the final system product
When we
use the Incremental Model?
- When
the requirements are superior.
- A
project has a lengthy development schedule.
- When
Software team are not very well skilled or trained.
- When
the customer demands a quick release of the product.
- You
can develop prioritized requirements first.
Advantage
of Incremental Model
- Errors
are easy to be recognized.
- Easier
to test and debug
- More
flexible.
- The
Client gets important functionality early.
- A new technology is being used
Disadvantage
of Incremental Model
- Need
for good planning
- Total
Cost is high.
- Well
defined module interfaces are needed.
