A math problem solving strategy that's proven to work

As I said before, there's a tough set of requirements that any problem solving strategy that's worth teaching to students as a singular go-to overarching framework must satisfy. I have yet to see a simple problem solving strategy satisfy all of those requirements, but here below is something that's been proven to work [1].

The Formulaic Action Oriented Problem Solving Strategy

It's "formulaic" because the back-end of the strategy is centered around using formulas to derive numeric solutions. But also, this strategy is "formulaic" because it's step-by-step, bringing students from start to finish of solving a problem.

It's "action oriented" because it critically answers for students the question of "what should I do?"