This paper presents a generalized model to investigate forecast horizons for a twoproduct dynamic lot-sizing model under production changeover and one-way demand substitution. Changeover costs emerge when production switches from one product to another. A high-grade product can be used to...

For most multi-period decision-making problems, it is generally well-accepted that the influence of information about later periods on the optimal decision in the current period reduces as we move farther into the future. If and when this influence reduces to zero, the corresponding problem...