Advantages and disadvantages of iterative model

Compared with the traditional waterfall model, the iterative process has the following advantages:

1) reduces the risk of incremental consumption. If the developer repeats an iteration, all he loses is the cost of this poorly developed iteration.

2) It reduces the risk that products cannot enter the market according to the established schedule. By identifying risks early in development, you can solve them as early as possible, instead of rushing into things later in development.

3) Accelerated the progress of the whole development work. Because developers know the focus of the problem, they will be more efficient.

4) Because the user's requirements can't be completely defined at the beginning, they are usually refined in the subsequent stage. Therefore, the model of this iterative process is easier to adapt to the change of demand.

The disadvantage of iterative model are:

Pre-project development may change, which requires a high-quality project manager and a high-tech development team.