This document discusses different models and approaches to decision making. It describes programmed versus non-programmed decisions, and how decision making involves varying degrees of certainty and risk. The ideal rational model is contrasted with how managers actually make decisions in practice, taking into account human limitations and satisficing. Different decision making steps and styles are outlined. The political model is presented as resembling real-world environments where diverse interests must be balanced. Factors that can lead to bad decisions are also listed.