生產與運作管理試題3

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1、P2962.已知A和F兩種產品的結構和產品出產計劃如下表，求原件B的總需求量。LT=3周LT=2周A2B3CF3B2X1YLT=4周LT=12周LT=2周周次12345678910111213產品A200150200150250300300300200100150產品F90200150200210100180150250200250解：周次12345678910111213產品A200150200150250300300300200100150B的需求量400300400300500600600600400200300產品F9

2、0200150200210100180150250200250B的需求量270600450600630300540450750600750B的總需求量2701000750100093080011401050135010009503003.已知對某零件的凈需求如表所示，單位訂貨費為100元，單位維持庫存費為0.25元/（件*周）（1）用EOQ公式確定訂貨量（2）試用MPG確定訂貨安排周次12345678910凈需求量200150100200100100150200150200解：(1)10周的平均需求為：D＝1550/10=15

3、5,年需求＝155×52＝8060年持有成本H＝0.25×52=13EOQ===352.14≈352（件）周次凈需求經濟批量期初庫存期末庫存庫存成本訂購成本各周總成本1200352352152631001632150152219.2519.2531003523542547610017642002545438.538.55100352406306891001896100306206646471502065632.7532.7582003524082087710017791502085833.2533.25102003524102

4、1077.5100177.5總成本1070.25(2)S/H=100/0.25＝400，用MPG法求訂貨批量的過程，如表所示：移動次數(shù)最小零件周期周次12345678910010020015010020010010015020015020011002002500200100100150200150200215020025003000100150200150200315020025003000250020015020042502002500300025003500200540045000300025003500200期初庫存Qs

5、450250100300100250150350150200期末庫存Qt25010001000150015000如圖所示訂貨安排為：第一周訂450件，第四周訂300件，第六周訂250件，第八周訂350件，第十周訂200件。CR=5×100＝500元CH=0.25×(450＋250＋250＋100＋100＋300＋100＋100＋250＋150＋150＋350＋150＋150＋200)/2＝381.25元CT=CR+CH=500+381.25＝881.25元