Optimal location model in emergency systems often regards location problem of an given deadline.Deadline and cost of emergency system facilities are both important.Considering these characteristics, A model based on all feasible deadlines is given.Regarding a sequence closely related linear_programming problems to be sloved, an algorithm based on a branch and bound method is given. In this manner, we can use the optimal solution of FLPS′(k)as a starting point in the reoptimization to obtain that of FLPS′...