Global SCM Optimize monthly inventory level of central warehouse, consider previous month demand 200883471 SONG YUN HO 2008.11.11 Term paper progress.

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Presentation transcript:

Global SCM Optimize monthly inventory level of central warehouse, consider previous month demand SONG YUN HO Term paper progress

Global SCM INTRODUCTION Optimize monthly inventory level of central warehouse, consider previous month demand  Well made inventory plan can be reduce inventory cost  In the One product inventory model, If each retailer shares one warehouse, It means that reduce cost more than distributed warehouse  Optimize inventory level of central warehouse can be change every month or season  This study want to decide Optimize monthly inventory level of central warehouse, consider previous month demand

Plant & Central warehouse Retailer 3 Retailer 4 Retailer 1 Retailer 2 Retailer 5  Optimize central warehouse inventory level  Consider previous month demand Global SCM Problem Optimize monthly inventory level of central warehouse, consider previous month demand

Global SCM How to decide optimal inventory level of central warehouse Service level Daily demand Safety stock level Reorder point Maximum capacity of warehouse Order amount Survey inventory level Demand during lead time Lead time Optimize monthly inventory level of central warehouse, consider previous month demand Central warehouse Stock out Stock in Optimal Inventory level ?

Global SCM Assumption Optimize monthly inventory level of central warehouse, consider previous month demand  Each retailer have safety inventory level during lead time  Each retailer follows (s,S) policy  Each retailer lead time already defined  We know previous month demand data  Plant & warehouse are located at same place Define Parameter D = Demand per day L = lead time T = Cycle time C = Maximum capacity s= Lead Time x AVGD S= Maximum capacity of warehouse AVGD= average daily demand

Global SCM Mathematical model Optimize monthly inventory level of central warehouse, consider previous month demand N = Number of retailer M = Number of day during One cycle D i = daily demand per r retailer (i ∈ 1, 2, · · 30, r ∈ 1, 2, · · 5) R i = retailer (i ∈ 1, 2, · · 5) D pmt r = demand during one cycle time per r retailer

retailer1retailer2retailer3retailer4retailer5 Demand Per day(D) Ran. Between (80,170) Ran. Between (60,120) Ran. Between (20,90) Ran. Between (60,140) Ran. Between (50,120) Lead time(L) Cycle time(T) Capacity(C) AVGD= average daily demand Global SCM Optimize monthly inventory level of central warehouse, consider previous month demand Generate historical data

Demand DayRetailer1Retailer2Retailer3Retailer4Retailer avg, retailer1retailer2retailer3retailer4retailer5 D L T C D = Demand per day, L = lead time, T = Cycle time, C = Maximum capacity Global SCM Example Optimize monthly inventory level of central warehouse, consider previous month demand

Global SCM Further Research Optimize monthly inventory level of central warehouse, consider previous month demand  Define problem more clearly  Make mathematical model  Find optimal value by solver

Global SCM Thank You!! Optimize monthly inventory level of central warehouse, consider previous month demand