A heuristic method.
The art of applying heuristic methods.
A technique designed for solving a problem when classic methods are too slow or fail to find any exact solution.
The study of heuristic methods and principles.
Heuristic methods and approaches considered collectively.
(by extension) Simple, efficient rules which people often use to form judgments and make decisions.
(by extension) Experience-based methods used to reduce the need for calculations pertaining to equipment size, performance, or operating conditions.