Agile method is a framework concept, generally centered on iterative and incremental delivery of working software. It is iterative because we are repeating, or iterating, a complete lifecycle of development over a short, fixed span of time. With each of these iterations, we ship some working subset, or increment, of features.
Several agile methods exist. Some of the more well known include extreme programming (XP), lean software development, Crystal, DSDM (Dynamic Systems Development Method), Scrum, and feature-driven development (FDD). What they generally have in common is the IID aspect, but more importantly they hold similar values and principles. I've listed a few things that each method emphasizes:
Lean - Move closer to customer, shorter cycles, eliminate waste, decide as late as possible, empower the team, build in integrity
DSDM(my favourite) - Empower the team to make decisions, emphasize frequent product delivery, integrate testing throughout, promote collaboration and cooperation between all stakeholders
FDD - Center development around the feature, create a domain model with domain experts
Crystal - Emphasize people, gather techniques from other methods, improve communications, adapt the process itself (shrink or grow to fit)
Scrum - Manage a prioritized list of requires on a product backlog, collaborate through daily standup meetings, exhibit the product upon iteration completion, use retrospectives to correct the process
XP - Emphasize the values of communication, simplicity, feedback, and courage; use specific technical and collaborative practices, including TDD, refactoring, pair programming, continuous integration, open workspace, and automated acceptance tests
Original post by Jeff Langr
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