Whether it’s software, a cell phone, or a refrigerator, your customer wants no, expects your product to be easy to use. This fully revised handbook provides clear, step–by–step guidelines to help you test your product for usability. Completely updated with current industry best practices, it can give you that all–important marketplace advantage: products that perform the way users expect. You’ll learn to recognize factors that limit usability, decide where testing should occur, set up a test p...