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Heuristic evaluation is a key part of designing a great product that users can easily engage with and find value in their interaction. The better the usability, the more users will engage with the product — and the higher the ROI. The heuristic evaluation process is conducted against a predetermined set of usability principles known as heuristics. The most commonly used criteria in usability inspection were developed by Jacob Nielsen in 1995, known as the Heuristics for User Interface Design. The process relies on in-depth tests run by several usability experts at a time. If you’re wondering why your product is performing terribly then a usability inspection will give you the answers you seek.