I find human performance a fascinating topic to teach during my supervisor training classes. Many readers of Incident Prevention are familiar with the topic. For those who aren’t, human performance is an analytical tool that examines how people accomplish tasks and why they perform those tasks in a particular way. Employees in the electric utility industry execute many of the same tasks each day. We do them according to the local culture’s work practices, primarily learned through on-the-job training. As older workers retire and new employees join the ranks, those work practices are passed down to the next generation.