Heuristic analysis is an extremely useful usability inspection method. It is a technique used in the UX Design process to test usability. Typically, in heuristic analysis, 3–5 usability experts will review the product and compare it against pre-defined principles — the heuristics. From this, they can highlight any usability issues before the product goes into user testing. This is great, as it cuts down on obvious usability errors and improves the testing process.