In this note we consider a multi-product environment where production lot-sizing and investing for quality improvement in several production processes are desired. We develop a mathematical model for addressing this important problem. We use our model to calculate the optimal lot-sizes and the...

Prior research has investigated the appropriate ordering policy for an inventory system. Two key factors to are daily demand and lead time. Many studies assume lead time and daily demand are independent. In this study, we relax this assumption for a continuous review inventory system and analyze...