The incremental model of software development is suitable if there is a clear plan of action, but the product needs to be launched quickly enough, and changes can be made later. Its essence is that first the action plan is developed and divided into small tasks. Then each “block” is developed according to the traditional cascade model. Initially, a “basic” product with minimal, but important functions is made. It is gradually supplemented by the development of other components, which are called increments. The process loops until there is a fully assembled single system.
Each part represents a finished element. Sometimes it can even be used separately. As a rule, it is designed so that it is not already redesigned. This is why the cascade model within the incremental model is used.
What does this software development methodology provide? First of all, it minimizes risks, ensures a quick launch of the product on the market. In addition, the basic functionality will already work and bring benefits to the business; it is always possible to implement new formed tools if the need arises.
Advantages of the incremental model
- You do not need to invest much money at the initial stage. The customer pays for the creation of basic features, receives the product, “rolls it out” to the market – and, based on the feedback, decides whether to continue development.
- You can quickly get feedback from users and promptly update the terms of reference. This reduces the risk of creating a product that no one wants.
- An error is cheaper. If a mistake was made during the development of the architecture, it will not cost as much to fix it as in the “waterfall” or V-model.