> The trouble is that in dynamic environments, the discipline necessary to properly practice scrum isn't really possible. It takes longer to define the requirem

> The trouble is that in dynamic environments, the discipline necessary to properly practice scrum isn't really possible. It takes longer to define the requirements than it does to code, and once coded they change mid-sprint. Scrum is not trictly bijective with agile. The concept of a sprint creates an entirely arbitrary deadline with an arbitrary box of work. (I have a dog in this fight: XP with Lean trimmings, since I work at Pivotal and learnt it in Labs)