Pengendalian Persediaan Untuk Mengurangi Biaya Total Persediaan Dengan Pendekatan Metode Periodic Review (R,s,S) Power Approximation Pada Suku Cadang Consumable (Studi Kasus : Job Pertamina Talisman Jambi Merang)

Abstract

Spare parts is one of the production support components which plays an important role for the survival
of gas production in the gas processing facility owned by SKN JOB Pertamina Talisman Jambi Merang. The
high inventory level increased the high inventory cost for the industry which get the benefit from the efficiency
of processes and resources. This research involved consumable spare parts for Solar Turbine engine as much
as 25 SKUs with demand character patterned lumpy demand and Poisson distribution. The implementation
of policies using Periodic Review (R, s, S) with Power Approximation approach in the inventory system
capable to generate a lower total cost inventory by pressing the backorder volume, the booking volume and the
inventory levels in a balanced manner. Calculation of Periodic Review (R, s, S) with Power Approximation
approach resulted inventory parameter which was able to press the total cost of inventory at 8.54% lower and
increase the service level by 1.11%.