In the vast majority of operations, people are a critical component to the functioning of the system and influence both the way operating systems work and how they perform. Yet most formal analytical models in operations assume that the humans who participate in operating systems are fully rational or at least can be induced to behave rationally. Many other disciplines, including economics, finance, and marketing, have successfully incorporated departures from this rationality assumption into their models and theories. In this paper, we argue that the scholars within operations management should do the same.