Keywords: batch process industry; inventory control; production planning;

In this paper the standard portfolio case with short sales restrictions is analyzed.Dybvig pointed out that if there is a kink at a risky portfolio on the efficient frontier, then the securities in this portfolio have equal expected return and the converse of this statement is false.For the...

The set of efficient (Rho2)-combinations in the (Rho2)-plane of the Markowitz portfolio selection method consists of a series of strictly convex parabola. In the transition points from one parabola to the next one, the curve may be indifferentiable. The article gives necessary and sufficient...

The interaction between forecast and inventory control has been under-exposed in the literature. This paper introduces a combined forecast-inventory control procedure that is appropriate especially for the lumpy demand character of spare parts. The proposed procedure is succesfully implemented...