"The Field Guide's premise is that human error is systematically connected to features of people's tools and tasks. If we want to understand what went on in people's minds, we must begin with a reconstruction of the situation in which the mind found itself. The key to an investigation is not to point out where people went wrong, but to understand how their assessments and actions made sense inside that situation at the time. The Field Guide offers investigators a way of how to do this."--BOOK JACKET.