Why? When does it work well or not?: Does not drive improvement or capability building, can stifle innovation and positive growth. Does not factor in outcomes - ignores efficiency. Can have false positives - goal can be achieved by doing nothing if next months usage decreases, or impossible to achieve if next months usage is significantly higher
Why? When does it work well or not?: Helps add meaning to cost and usage, allows for adjustment between effort/reward with the % of bill approach, instead of using resource count.