The document discusses the relationship between individuals, systems, and performance. It presents an equation that any measure of performance (Z) is a function of both the individual (X) and the individual working within the system or process (XY). It notes that while individuals contribute to performance, the system and how well it integrates with people also impacts results. The document provides an example of a meter reader who was in three vehicle accidents. An investigation revealed the accidents were actually caused by the type of vehicle assigned, not poor driving. Changing the vehicle type solved the problem and improved performance.