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Develop Iteratively

The process demands that development be carried out iteratively and incrementally, that is the process of building software in small steps with each step adding incrementally to the functionality of the system. The cycle of Requirements Capture, Analysis, Design, Implementation and Testing are carried out many times in iterations, the duration of which can be as small as one week.

This produces robust systems, which can be delivered in a series of controlled deployments. Every iteration reduces the risk of the programs not fulfilling the users requirements, by feeding back the test results into the requirements stage. An iterative process also facilitates the incorporation of changing requirements with the time-sequential order of the iterations based on use case prioritisation and risk.

The process of producing frequent executable releases also avoids the risk of experiencing integration issues late in the project lifecycle.

fig 1. Risk profile of Iterative Development



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