生产与运作管理试题3

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1、P2962.已知A和F两种产品的结构和产品出产计划如下表，求原件B的总需求量。LT=3周LT=2周A2B3CF3B2X1YLT=4周LT=12周LT=2周周次12345678910111213产品A200150200150250300300300200100150产品F90200150200210100180150250200250解：周次12345678910111213产品A200150200150250300300300200100150B的需求量400300400300500600600600400200300产品F9

2、0200150200210100180150250200250B的需求量270600450600630300540450750600750B的总需求量2701000750100093080011401050135010009503003.已知对某零件的净需求如表所示，单位订货费为100元，单位维持库存费为0.25元/（件*周）（1）用EOQ公式确定订货量（2）试用MPG确定订货安排周次12345678910净需求量200150100200100100150200150200解：(1)10周的平均需求为：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）周次净需求经济批量期初库存期末库存库存成本订购成本各周总成本1200352352152631001632150152219.2519.2531003523542547610017642002545438.538.55100352406306891001896100306206646471502065632.7532.7582003524082087710017791502085833.2533.25102003524102

4、1077.5100177.5总成本1070.25(2)S/H=100/0.25＝400，用MPG法求订货批量的过程，如表所示：移动次数最小零件周期周次12345678910010020015010020010010015020015020011002002500200100100150200150200215020025003000100150200150200315020025003000250020015020042502002500300025003500200540045000300025003500200期初库存Qs

5、450250100300100250150350150200期末库存Qt25010001000150015000如图所示订货安排为：第一周订450件，第四周订300件，第六周订250件，第八周订350件，第十周订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