问题
单项选择题
In your construction project, the CPI is 1.30 and SPI is 0.85. What could be the potential reason ？（）
A．A critical resource went on sick leave for a long period of time, which had not been anticipated earlie
B．The Cost of raw materials required for construction increased 10%.
C．You had not taken into account inflation rat
D．There was 4 days waiting time in the curing of cement, and work could not be done during that tim
答案
参考答案：A
解析：
你所在的建筑项目的CPI为1.3, SPI为0.85。下列哪项是潜在的原因 A) 关键资源长时间离开, 这是之前没有预料到的。 B) 建筑所需材料的成本增加了10%。 C) 你以前没考虑通货膨胀率。 D) 在水泥加工中有四天的等待时间, 这段时间内无法工作。 选项B、选项C都会增加成本，但是这个项目成本没有问题(CPI＞1)，我们可以忽略这两个选项。选项D是个已知的因素，在项目进度计划中已经考虑。只有选项A最可能导致进度落后。