单选题 The cost of a construction project was originally estimated at the $100000000. The current forecast to completion is $175000000. This could be due to ______.

A. poor project planning in terms of scope, specifications, strategy and implementation
B. experienced project planning and management staff are expensive and difficult to find
C. project administration is an overhead cost which contributes greatly to an increase in overall project cost
D. A and B

【正确答案】 A

【答案解析】读者可能会选择D。B之所以不对，是因为“经验丰富的项目计划和管理人员非常昂贵”这一事实不是动态变化的因素，对于这一事实的估计不足是完全可以避免的。然而，由于范围、规范、策略和实施等方面可能处于一个动态的、不明确的状态，对它们做到较准确的估计是很困难的。一个建筑工程的费用原先估计为$100000000。目前估算完成费用为 $175000000。这可能是因为______。 A) 在项目范围、规范、策略和实施方面规划不当 B) 经验丰富的项目计划和管理人员非常昂贵并且很难找到 C) 项目行政管理是一般管理费用，它在整个项目的费用中增加了很多 D) A和B