某机构拟进行办公自动化系统的建设，有四种方式可以选择：①企业自行从头开发；②复用已有的构件；③外购现成的软件产品；④承包给专业公司开发。针对这几种方式，项目经理提供了如下表所示的决策树。其中在复用的情况下，如果变化大则存在两种可能，简单构造的概率为0.2，成本约31万元；复杂构造的概率为0.8，成本约49万元。据此表，管理者选择建设方式的最佳决策是（ ）。
- A.企业自行从头开发
- B.复用构件
- C.外购现成的软件产品
- D.承包给专业公司开发
正确答案及解析
正确答案
解析
通过计算得到:自行开发: 42.9万，复用: 38.24万，外购: 23.7万，承包: 41,所以选择外购。
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