Agile software development is a conceptual framework for

software engineering that promotes development iterations

throughout the life-cycle of the project.

There are many agile development methods; most minimize risk

by developing software in short amounts of time. Software

developed during one unit of time is referred to as an

iteration, which may last from one to four weeks. Each

iteration is an entire software project: including planning,

requirements analysis, design, coding, testing, and

documentation. An iteration may not add enough functionality

to warrant releasing the product to market but the goal is

to have an available release (without bugs) at the end of

each iteration. At the end of each iteration, the team

re-evaluates project priorities.