Four major types of modeling were detailed in the preceding chapters. (1) The problem of resource allocation, which was extended to deal with the allocation of multiple resources in the context of multiple constraints. (2) Value of information problems, which ask how much should be paid to get more information to help with decision-making. (3) Queuing problems, which ask how to minimize waiting times for a service when demand is higher than supply. And (4), extending the simple “one-box” queuing model to a multibox Markov model, which determines how to estimate the incidence and prevalence of disease in a population given complex probabilities of getting the disease or being treated for it, and compares the effectiveness and cost-effectiveness of programs to address that disease. In this chapter, all four of these key modeling techniques will be examined in a common context: designing and evaluating a program to address a famine.