Abstract
The purpose of this research is to determine and analyze the minimum order quantities and the supply cost through Economic Order Quantity (EOQ) Model without Stock Out, EOQ Model with Buffer Stock, and Robust Optimization. EOQ model without Stock Out is an inventory model with a fixed number of requests and a fixed period of demand so the goods are considered always available or there is no stock out. Whereas EOQ Model with Buffer Stock is an inventory model with uncertainty demand during the lead time that described with a uniform density function. Another model is Robust Optimization Model that is used for cases with uncertainty demand. The results showed that the minimum order quantities through EOQ Model without Stock Out and EOQ Model with Buffer Stock was almost the same value but the cost was more minimum with the EOQ Model with Buffer Stock. Whereas, through the Robust Optimization Model there are different minimum order quantities for each period with a minimum supply cost compared to the two previous models. This occurs in both types of Spuit, namely Spuit Terumo 3 mL and Spuit Terumo 5 mL.
Highlights
The purpose of this research is to determine and analyze the minimum order quantities and the supply cost through Economic Order Quantity (EOQ) Model without Stock Out, EOQ Model with Buffer Stock, and Robust Optimization
The results showed that the minimum order quantities through EOQ Model without Stock Out and EOQ Model with Buffer Stock was almost the same value but the cost was more minimum with the EOQ Model with Buffer Stock
4.2 Saran Pada penelitian ini, peneliti tidak mengkaji mengenai model terbaik yang dapat digunakan untuk menentukan jumlah pemesanan minimum dan biaya penyediaan
Summary
Pelayanan medis di suatu rumah sakit tentu berkaitan erat dengan persediaan alat-alat medis, salah satunya yaitu alat suntik (spuit). Berdasarkan hasil wawancara dengan pihak Depo Farmasi RSU Surya Husadha, diketahui bahwa alat suntik yang paling banyak digunakan dalam satu tahun terakhir yaitu Spuit Terumo 3 mL dengan rata-rata pemakaian sebanyak 113 unit/hari dan Spuit Terumo 5 mL dengan rata-rata pemakaian sebanyak 155 unit/hari. Beberapa model yang dapat digunakan dalam masalah persediaan yaitu Economic Order Quantity (EOQ) (Haming, et al, 2017) dan Optimisasi Robust (Bertsimas & Thiele, 2006). Model EOQ dengan Cadangan Penyangga (buffer stock) merupakan model persediaan dengan permintaan tidak tentu selama masa tenggang yang dijabarkan dengan fungsi densitas uniform (Siagian, 2006). Adapun tujuan dari penelitian ini yaitu menentukan serta menginterpretasi jumlah pemesanan minimum dan biaya penyediaan alat suntik melalui model Economic Order Quantity (EOQ) dan Optimisasi Robust
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