Inventory models need some specification of the distribution of demand in order to find the optimal order-up-to level or reorder point. This distribution is unknown in real life and there are several solutions to overcome this problem. One approach is to assume a distribution, estimate its...

In this paper we use Lagrange interpolation polynomials to obtain good gradient estimations. This is e.g. important for nonlinear programming solvers. As an error criterion we take the mean squared error. This error can be split up into a deterministic and a stochastic error. We analyze these...

Production Planning and Inventory Control (PPIC) is an essential dynamics of the logistical performance of manufacturing organizations. In this paper, we discuss the development of a PPIC system in a process industry. The process manufacturing industry has not embraced the new Advanced Planning...