Chapter 5 introduces into the decision-making procedures. First the notion of decision-making procedure is explained. Then four types of decision-making procedures are distinguished: general heuristic decision-making procedures, specific heuristic decision-making procedures, general analytic decision-making procedures and specific analytic decision-making procedures. It follows a comparison of heuristic and analytic procedures. Finally, to get a better understanding of the different types, three examples of decision-making procedures are given: a procedure for developing corporate strategies, the linear programming and the Harris-Wilson model for determining the optimal order quantity.