Heuristic

In computer science, a heuristic is an algorithm or procedure designed to solve a problem that ignores whether the solution is probably correct, but which usually produces a good solution or solves a simpler problem that contains or intersects with the solution of the more complex problem.

A heuristic is not guaranteed always to solve the problem, but often solves it well enough for most uses, and often does so more quickly than a more complete solution would.