The classic document on this topic is Richardson's Maturity Model, which is quite well and compactly explained by Fowler in his article: http://martinfowler.co

The classic document on this topic is Richardson's Maturity Model, which is quite well and compactly explained by Fowler in his article: http://martinfowler.com/articles/richardsonMaturityModel.html http://martinfowler.com/articles/richardsonMaturityModel.htm...