6. Inventory Classifications Inventory Process stage Demand Type Number & Value Other Raw Material WIP Finished Goods Independent Dependent A Items B Items C Items Maintenance Repair Overhaul .
18. Manufacturing Suitability Process Discrete Make to Stock Consumer Packaged Goods Batch Food Products Pharmaceuticals Oil & Gas Process Repetitive Electronic Components Configurable Products Make to Order Assemble to Order Personal Computers Automotive Components Aerospace Project Engineer to Order Custom Products & Equipment
35. A = The annual usage in units S = The overhead cost of placing one order C = The unit cost i = The carrying cost rate What is the formula for EOQ? What do the terms mean? Calculating EOQ EOQ iC AS 2
36. C O S T ORDER QUANTITY E.O.Q . ORDER PLACEMENT/ SETUP COST STOCK HOLDING COST Economic Batch Quantity
39. TIME S T O C K L E V E L SAFETY STOCK LEVEL (SS) MQ LT USAGE ( U) = 10 UNITS / DAY LEAD TIME ( LT) = 5 DAYS SAFETY STOCK (SS) = 20 UNITS Minimum Quantity (MQ) = SS + ( LT x U ) = 20 + ( 5 X 10 ) = 70 UNITS MQ = user defined 20 40 70 Minimum Quantity - Example
44. LT Time Expected demand during lead time Maximum probable demand during lead time MQ Quantity Safety stock Determining Safety Stock
45.
46. EOQ MQ Safety Stock Inventory (Units) 3 days 6 days 9 days 12 days Average Lead Time (3 days) MQ with Safety Stock EOQ, Minimum, Safety Stock Levels