Or maybe you've developed a kiosk interface for the general public, perhaps to charge fees at a parking garage. The kiosk has step-by-step instructions for use stenciled on its front. Of course, even if things go terribly in following the instructions, no one will get hurt. But the garage owners could lose customers if they keep getting frustrated or lose money, and if people tend to get confused while using the system, an increasingly long line of waiting patrons may show their impatience. The step-by-step instructions constitute an operating procedure, and you hope you've got a good one. So…
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