This note presents a modified method to compute economic order quantities without derivatives by cost-difference comparisons. Extensions to allow backorders are done for the EOQ/EPQ models. In contrast to previous literatures, limiting values on a finite planning horizon are used rather than...

In this study, a fuzzy multi-objective joint replenishment inventory model of deteriorating items is developed. The model maximizes the profit and return on inventory investment (ROII) under fuzzy demand and shortage cost constraint. We propose a novel inverse weight fuzzy non-linear programming...

This study explores an efficient approach for identifying chaotic phenomena in demands and develops a production lot-sizing method for chaotic demands. Owing to the butterfly effect of chaotic demands, precise prediction of long-term demands is difficult. The experiments conducted in this study...

Due to increasing competitive pressure, shortened life cycle and environmental consciousness, more attentions have been paid to resource usage reduction and ecology protection. Green product design has received much attention recently, because product design significantly influences the cost of...

The ordering policy for retailers and the suppliers' system are influenced by lead time and deterioration. In this study, we consider deteriorating items with triangle-shaped demand and uncertain lead time. The triangle-shaped demand has the characteristic of increasing demand during the...