A note on ‘Stability of the constant cost dynamic lot size model’ by K. Richter

In a paper by K. Richter the stability regions of the dynamic lot size model with constant cost parameters are analyzed. In particular, an algorithm is suggested to compute the stability region of a so-called generalized solution. In general this region is only a subregion of the stability region of the optimal solution. In this note the authors show that in a computational effort that is of the same order as the running time of Richter’s algorithm, it is possible to partition the parameter space in stability regions such that every region corresponds to another optimal solution.