財(cái)務(wù)管理與財(cái)務(wù)分析運(yùn)營管理課件5-wenkub.com
2025-08-09 14:11 本頁面
【正文】 180。 4. The economic order quantity minimizes the sum of the inventory and the set up costs and is: Q* = h R K 180。 Manufacturing Management Cachon Chapter 5 Batching and other flow interruptions setup times and the economic order quantity method Operations Management Example: batch size ? It takes one minute to produce one steer support unit (of which there is one per product) ? It takes 60 minutes to change over the milling machines from producing steer supports to producing ribs (setup time) ? It takes minute to produce one rib, since there are two ribs in a product, this translates to one minute/unit ? Finally, it takes another 60 minutes to change over the milling machines back to producing steer supports. One product has two kind of ponents: one steer support unit, two ribs。 One machine is used to produce both ponents. Operations Management Batch of 12 Batch of 60 Batch of 120 Batch of 300 Time [minutes] 60 120 180 240 300 Setup from Ribs to Steer support Setup from steer support to ribs Produce ribs (1 box corresponds to 24 units = 12 scooters) Produce steer supports (1 box corresponds to 12 units = 12 scooters) Production cycle Production cycle THE IMPACT OF SETUPS ON CAPACITY Operations Management Calculate capacity ? Cachon Chapter 5, page 200, Table Operations Management P ro d u c t io n w it h la rg e b a t c h e sP ro d u c t io n w it h s m a ll b a t c h e sCy c leI n v e n t o ryE n d o fMo n t hB e g in n in g o fMo n t hCy c leI n v e n t o ryE n d o fMo n t hB e g in n in g o fMo n t hP ro d u c e S e d a nP ro d u c e S t a t io n w a g o nBATCH FLOW OPERATIONS CARRY A LOT OF INVENTORY ? Example: Movie theater vs. a room full of DVD players Steer support Rib Operations Management CAPACITYFLOW TIME FOR A BATCH PROCESS ? Consider the following batch flow process consisting of three process steps performed by three
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