ANALISIS PERENCANAAN PERSEDIAAN CARBON BRUSH DALAM KEGIATAN PEMELIHARAAN MESIN DI PT. PEMBANGKITAN JAWA-BALI UPMTW
Keywords:carbon brush, Economic Order Quantity, Reorder Point, Total Inventory Cost.
UPMTW is one of power plant PT. PJB. One of the problems in UPMTW today is determining the amount of carbon brush inventory not consider carbon brush replacement schedule. So the request is not based on the calculation of carbon brush needs for electricity production with investment costs. Based on the history of usage and carbon brush supplies in 2015 are stored in the warehouse of carbon brush as many as 149 units with an inventory value of Rp 219.402.500. It is therefore necessary planning and inventory control carbon brush is optimal based on the pattern data when replacing the carbon brush with a way to test the suitability of the failure distribution, calculate the expected demand of carbon brush, specify the number of economic order quantity, reorder point, expected demand for lead time, safety stock, and total cost of inventory. With Minitab software using analysis goodness of fit Anderson-Darling Test results obtained by testing the data distribution has a failure distribution pattern weibull. From the calculation of the inventory of carbon brush with a sample calculation 1 generator for the time inventory planning 180 days result expectations required demand of carbon brush 70 units, the number of economic order quantity 31 units, reorder point 22 units, expectations demand for a lead time of 12 units, safety stock 10 units, and total inventory cost Rp. 4.187.397.