Mike Kohn has a nice description and presentation of the SCRUM development process on his web site.
"Scrum works because it is a highly-empowering process that allows requirements and self-organizing teams to emerge. In their book, Schwaber and Beedle describe Scrum as an empirical process that uses frequent inspection (daily meetings), collaboration and adaptive responses. They contrast this to defined processes in which every task and outcome is defined. Defined processes work only when the inputs to the process can be perfectly defined and there is very little noise, ambiguity or change. If that doesn't sound like the software projects you work on, look into Scrum."
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