ANALISIS PERENCANAAN PERSEDIAAN CARBON BRUSH DALAM KEGIATAN PEMELIHARAAN MESIN DI PT. PEMBANGKITAN JAWA-BALI UPMTW

Abstract

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.