Context : TypesOfThinking
Cute way of representing problems with constraints. Hence
- ShirkysLaw : equality, fairness, opportunity ... pick two
- the engineer's maxim : on time, on budget, as specified ... pick two
- Contrast TheMythicalManMonth, sometimes projects are not fungible enough to be able to trade "budget")
Of course, there's also "Pick One" as in "NuclearEnergy : safe and cheap ... pick one"