Incremental Model is a process of software development where requirements are broken down into multiple standalone modules of software development cycle. Incremental development is done in steps from analysis design, implementation, testing/verification, maintenance.
Each iteration passes through the requirements, design, coding and testing phases. And each subsequent release of the system adds function to the previous release until all designed functionality has been implemented.
The system is put into production when the first increment is delivered. The first increment is often a core product where the basic requirements are addressed, and supplementary features are added in the next increments. Once the core product is analyzed by the client, there is plan development for the next increment.
|Incremental Phases||Activities performed in incremental phases|
|Requirement Analysis||Requirement and specification of the software are collected|
|Design||Some high-end function are designed during this stage|
|Code||Coding of software is done during this stage|
|Test||Once the system is deployed, it goes through the testing phase|
|The software will be generated quickly during the software life cycle||It requires a good planning designing|
|It is flexible and less expensive to change requirements and scope||Problems might cause due to system architecture as such not all requirements collected up front for the entire software lifecycle|
|Throughout the development stages changes can be done||Each iteration phase is rigid and does not overlap each other|
|This model is less costly compared to others||Rectifying a problem in one unit requires correction in all the units and consumes a lot of time|