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【简答题】
某公司需要决定建大工厂还是建小工厂来生产一种新产品，该产品的市场寿命为10年，建大工厂的投资费用为280万元，建小工厂的投资费用为140万元。10年内销售状况的离散分布的状态如下：高需求量的可能性为0．5；中等需求量的可能性为0．3；低需求量的可能性为0．2。 公司进行了成本一产量一利润分析，在工厂规模和市场容量的组合下，它们的条件收益如下： (1)大工厂，高需求，每年获利100万元。 (2)大工厂，中等需求，每年获利60万元。 (3)大工厂，低需求，由于开工不足，引起亏损20万元。 (4)小工厂，高需求，每年获利25万元(供不应求引起销售损失较大)。 (5)小工厂，中等需求，每年获利45万元(销售损失引起的费用较低)。 (6)小工厂，低需求，每年获利55万元(因工厂规模与市场容量配合得好)。 用决策树方法进行决策。
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