Scrum is an iterative, incremental framework for agile software development. Although Scrum was intended for management of software development projects, it can be used to run software maintenance teams, or as a general project/program management approach.
There are several implementations of systems for managing the Scrum process, which range from yellow stickers and whiteboards, to software packages. One of Scrum’s biggest advantages is that it is very easy to learn and requires little effort to start using.
Here's one nicely plotted at http://bit.ly/bGQNd1
