PT PQR is company that stand as a single agent that hold Peugeot brand in
Indonesia. It is selling cars and spare parts for Peugeot. Other than that, it also
provides after sales service for Peugeot car. As a company that sells spare part, it is
important to maintain stock of those spare parts well in order to face unpredictable
demand. Generally problem that occurs in PT PQR is spare parts stock that occurs
in company’s inventory system run into pile up. It causes total inventory cost that
expensed by company exceeds inventory cost allocation. Total inventory cost that
exceeds inventory cost allocation is Rp167.766.171.
Based on that problem, spare parts classification and inventory policy is necessary
important to minimize overstock that experienced by company. In this research,
spare part classification is performed using ABC-XYZ analysis. ABC analysis for
determine which group of spare part that contribute a lot to inventory cost. Then
XYZ analysis used for grouped spare parts based on their demand variability.
Inventory policy determined using periodic review (R,s,S) and (R,S) method.
Because in current condition company has agreement with parent company to order
spare parts following ordering batch or once a month. The objective of using those
methods are determine optimal review or replenishment interval, re order point and
maximum inventory level in order to minimize overstock.
The result of proposed inventory policy using periodic review (R,s,S) and periodic
review (R,S) is reduction of total inventory cost by 37,78% due to reduction of
total inventory cost component. This reduction, results total inventory cost
Rp167.671.572 below total inventory cost allocation