Why a sociotechnical framework is necessary to address diagnostic error.
Systems Engineering Initiative for Patient Safety (SEIPS) 101 model is a sociotechnical framework that characterizes the interactions of work system factors, processes, and outcomes. This article describes how one tool within the SEIPS 101 model— the People, Environment, Tools and Tasks (PETT) scan— assists patient safety investigators to identify the sociotechnical systems factors and their interactions in diagnostic error cases.