A multi stage series system with stochastic lead time and multiple demand classes is considered.Starting from the raw materials,the product is processed in the system stage by stage.There exist multiple demand classes for the final product.At each time epoch,the system manager must decide(1) whether or not to activate the production process at a stage and(2),should demand from a particular class arise,whether or not to satisfy it from existing inventory.The system manager seeks to minimize the t...