I can't find it now (would appreciate a link if somebody has one), but "pivot table" I believe was the name for a process where you would follow the intersecting points on a multi-equation graph that would represent the maximal value.

Essentially you have some maximal resource, i.e. money, and you are trying to figure out how it can be used most effectively under several constraints (don't have to be linear).

I remember distinctly having the calculate them by hand in an A-level math exam in the UK.