ANALISIS PENGENDALIAN PERSEDIAAN KAYU MENGGUNAKAN METODE ECONOMIC ORDER QUANTITY MODEL LAGRANGE MULTIPLIER (STUDI KASUS: CV 95)

Abstract

CV 95 is a company engaged in the field of building materials. One of the stored materials is meranti wood eith dimensions of 2 x 2 x 16 feet. In the inventory of wood products, there are several contrains, namely inadequate warehouse capacity and limitations on inventory costs. The company places orders once a month. However, in reality the company often experiemces wood inventory exceeding warehouse capacity, resulting in additional cost in inventory holding costs, leading to wood inventory holding costs exceeding the company’s maximum allowable costs. Based on this issue, CV 95 needs an inventory control method to address the existing problems. EOQ Lagrange Model is a method that can be used to control inventory. By using the EOQ Lagrange Multiplier method, it will assist the company in determining better inventory policies in inventory determination. This study aims to determine the total inventory cost of meranti wood products at CV 95, which will by compared eith inventory control using the Economic Order Quantity Lagrange Multiplier Model. In data processing, inventory control will be conducted using actual data and inventory control with forecasted data for the next 12periods using cyclic forecasting, cyclical trend, and ARIMA methods. From the data processing that has been conducted, the results show a minimization of inventory costs. For the total inventory cost of the company’s, it is Rp. 14,848,000 while using the EOQ Lagrange Multiplier Mode on historical data, the total inventory cost obtained is Rp. 13,713,619 resulting in a cost minimization of Rp. 1,134,381. Meanwhile, the total inventory cost from processing the forecast data for the next 12 periods is Rp. 13,624,606, resulting in a cost minimization of Rp. 1,223,394.