Refer to TMC$$s project selection problem presented in this chapter. In the solution shown in Figure $8\mathrm{.}21,$ notice that the probability of success for project $4$ is only $0\mathrm{.}3488.$ Thus, project $4$ is almost twice as likely to fail as succeed if it is assigned only three engineers. As a result, management might want to add a constraint to this problem to ensure that if a project is selected, it must have at least a $50\%$ chance of succeeding.