The alarm goes off at 3am. By the morning, three people can tell you three different things about what happened, and none of them can show you. That is the problem I built for this week. The three facts that never live in the same place I spent twenty years in supermarket operations, most of it as a COO. Here is how an incident actually gets handled in a shop that has cameras: The chiller alarm fires. Nobody hears it at 3am. At 7am someone notices the temperature log. T...