การบริหารจัดการสินค้าคงคลังของวัสดุสิ้นเปลือง: กรณีศึกษา โรงงานผลิตอาหารแปรรูป

Abstract

This  research  aims  to  find  the  optimal  order  policies  of   supplies  used  in  a food production plant. Currently, this case company has determined policy for purchasing those required supplies according to their demands from the past which did not have any policy applied as yet. According to the past data, it was revealed that some items were shortage, whereas the others had too much amounts than the requirements. As a result, the total inventory cost was increased. The research was proposed the optimal order policy to determine a suitable inventory level and reorder point for supplies item for the case company. ABC classification technique was applied for grouping supplies items and then only one item i.e. heat seal tape was employed as a representative for analysis using Economic Order Quantity and Monte Carlo Simulation techniques. After that, the total inventory costs from both techniques were compared in order to select the suitable one.

               The findings were revealed that the Monte Carlo Simulation techniques gave a lower cost. While considering a coefficient of variation (VC) of the usage demand of heat seal tape within a past year, it was 1.27. It is accordance with Peterson-Silver rule which stated that if the usage demand of each item is not stable or VC is higher than 0.20, EOQ technique is not appropriate for determining a suitable inventory level and reorder point.