-------------------------------------------------------------------------------------------------------- Here is Edward Bear, coming downstairs now, bump, bump, bump on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he-feels that there really is another way, if only he could stop bumping for a moment and think of it. And then he feels that perhaps there isn't.
我认为你的PDM中存在一个问题：按照英文原文，购买电器用具和安装橱柜间的关系并不如你所画－－Available for installation by the time. 照你的理解，你把这个动作拆分成了购买和安装两部份，但题意是指购买好并Ready for installation。诚然，完成到完成是非常少见的例子，比如工程施工中的巡检，在无法体现循环的PDM图中，就最好用完成对完成来表示。 最后，这道题应该是PMI的标准样题吧，我相信答案也是标准的。退一万步讲，即使我们都理解了PDM中四种活动关系，并对这道题存有不同意见，我想你也会在考试中选择“完成对完成”吧，呵呵。
-------------------------------------------------------------------------------------------------------- Raymond Sun, PMP 深圳市博实信息咨询有限公司 Shenzhen Bridge Information Consulting Co., Ltd. Email: raymond@pmbic.com Website: www.pmbic.com
-------------------------------------------------------------------------------------------------------- Here is Edward Bear, coming downstairs now, bump, bump, bump on the back of his head, behind Christopher Robin. It is, as far as he knows, the only way of coming downstairs, but sometimes he-feels that there really is another way, if only he could stop bumping for a moment and think of it. And then he feels that perhaps there isn't.
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