BIAYA TRANSPORTASI TIDAK LINEAR DALAM MODEL SIKLUS PERSEDIAAN OPTIMAL GABUNGAN UNTUK PRODUK YANG MENGALAMI DETERIORASI

Jonrinaldi, Jonrinaldi and Suprayogi, Suprayogi (2014) BIAYA TRANSPORTASI TIDAK LINEAR DALAM MODEL SIKLUS PERSEDIAAN OPTIMAL GABUNGAN UNTUK PRODUK YANG MENGALAMI DETERIORASI. ANALISIS PELAKSANAAN BAURAN PEMASARAN (MARKETING MIX) DI PERUM PEGADAIAN KOTA PADANG, 6 (1). ISSN 1412-4769

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Abstract

Traditional model of inventory management only considering one aspect that is supplier or buyer. This inventory policy will cause optimal lot size which obtained profiting just one of the parties, supplier or buyer. Thereby, to party owning bargaining position and strong negotiation, of course, will be profited with that policy so that not give good cooperation among both. Traditional Inventory model ( EOQ and of EMQ) assume that existing product in stock not experience of damage/ deterioration until the product accepted by consumer. In a few product type, this not applicable assumption like food product, photography films, medicine, chemical product, electronic component, etc. Damage/ natural deterioration by the product, of course, will result loss to buyer. Traditional inventory model also assume the ordering cost of each optimal lot size the obtained is remain to. This imprecise assumption if amount of big enough ordered lot which exceeds capacities of transportation. So that optimal lot size is very influenced by capacities of transportation. This study expense nonlinear transportation cost in joint optimal inventory cycle model for deteriorating product. Supplier produce product in certain time, later; sent to buyer with amount of optimal lot size which depended to capacities of transportation. During staying in inventory of supplier, on the way, and in stock buyer, the product experience of damage/ deterioration with fast assumption of constant damage. Matematical modelling conducted to get optimal inventory cycle ( t*), with minimal total joint inventory cost between supplier and buyer with definite transportation capacities. Numeric example given to illustrated that model. Keywords : joint optimal inventory cycle, deterioration, nonlinear transportation cost, joint optimal lot size, total inventory cost

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