The term Iterative and Incremental Development (IID) describes a class of methodologies for software development where the system grows incrementally through a series of complete development cycles. Agile software development methods are a group of specific iterative methodologies that combine relatively short iterations with evolutionary refinement of the requirements, plans and targets across each subsequent iteration.

In our experience, agile and iterative methodologies are more reliable and lower risk than using more traditional ‘waterfall’ style methods for software development. We have also found that various Agile software methods such as eXtreme Programming (XP), Scrum, Unified Process (UP) and Evo supply important and useful paradigms for reliable delivery of software development projects.

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