Model Penjadwalan Pengiriman Pasokan pada Strategi Multi-Supplier dengan Variasi Harga dan Lead Time untuk Permintaan Stokastik

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Abstract: Multi-supplier is one of the strategies to minimize holding cost and average stock-out cost as long as to stabilize the supply of raw materials. The common problems that the firms may face when applying the multi-supplier strategy are determining the right schedule and quantity ordered for each supplier. Complexity of the problem increases with the facts that each supplier may have different parameters, demand is uncertain, and the firms’ constraints. Thus, this research  is  done  to  answer  two  main  objectives:  (1)  to  determine  the  optimum  safety  time (minimum raw material inventory) to prevent the stockout due to the demand uncertainty and (2)  to  determine  the  right  schedule  and  quantity  ordered  for  each  supplier  considering  the different suppliers parameters: price, lead time, and supply capacity. The problem is modeled in Mixed Integer Linear Programming with total minimum inventory cost as the objective. With the  aim  of  testing  the  model,  a  case  of  multinational  company  that  apply  the  multi-supplier strategy is used.  
Keywords:  Multi-supplier, mixed  integer  linear  programming,  inventory,  scheduling, safety time
Penulis: Nur Aini Masruroh, Anggita Virgiana Prasetyorini
Kode Jurnal: jptindustridd150167

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Jp Teknik Industri dd 2015