ExtremeProgrammingInstalled [p. 14] uses the circle of life to describe how a project can be steered to success:
Customer: define value Programmer: estimate cost Customer: choose value Programmer: build value repeat!In the circle, both customers and programmers learn how value the proposed features actually are, and how difficult they are to build.
The importance of the circle of life lies in the fact that it makes programmers and customers see that they depend on each other.
The circle of life teaches how one can focus all his/her energy to the central point of it. So this is the way to get best results with best efforts. -- Nidhi Agarwall
Wait! This is Map 11 in Doom 2! No, wait a minute! Map 11 is "Circle of Death!" Never mind!