Integrated Siting Systems, Inc., has developed a satellite-based tracking system that continuously updates and displays the location of every vehicle in its network. A recently signed contract presents new technical challenges that may make the normally installed system inadequate. While it is possible to augment the system so that it will definitely work, doing so is costly. Alternatively, it is possible to conduct an imperfect test that will improve the company's information about whether the normal system will work. An alternative to this system is Emergency Vehicle Positioning, Inc. (see UVA-QA-0512). Except for the name, date, final paragraph (which mentions the other conditional probabilities), and the exhibit of conditional probabilities, the two cases are identical.