PT. SMA is a company located in Sunter, Pegangsaan Dua, Cikarang, Cibitung and
Cikampek engaged in automotive business which aims to fulfill demands for
motorcycles in I
ndonesia. PT. SMA currently has a total production capacity of 4,2
million unit of motorcycles yearly. PT. SMA Pegangsaan Dua produces 5 types of
motorcycles. This research is conducted in raw material 1 warehouse at PT. SMA
Pegangsaan Dua, Kelapa Gading.
PT. SMA Pegangsaan Dua imposes an inventory policy upon which monthly order
of parts interval and constant order quantity are determined without concerning the
maximum inventory level and inventory remains in warehouse. The unbalance
between the constant a
mount of production quantity and the fluctuating supplier
demand for parts gives rise to the overstock problem which causes the increase in
total inventory cost. Since the demand for raw material is probabilistic, the
improvement is carried out on the opti
mal order lot size and order interval of raw
material.
Inventory policy is started by calculating the amount of raw material needs based
on its dependence on finished goods. It is calculated by using continuous review
(s,S) model, which results in total in
ventory cost saving at 17% a year or Rp
359.487.227.529,57. nventory, overstock, economic order quantity, continuous review (s,S) model, Hadley - Within model