问题
单项选择题
Since you are in the preliminary stages of your project, you estimate that your project will most probably last 1 year-however, optimistic scenario is that it will get over within 6 months and pessimistic scenario is 18 months. This kind of estimate is also called ______ .
A) definitive
B) capital cost
C) order of magnitude
D) feasibility
答案
参考答案：C
解析： 在项目筹备阶段, 你估算这个项目很可能在1年完成, 然而乐观估计这个项目会在
A) 确定的 B) 资本成本 C) 量级估算 D) 可行性
估算有不同的精确程度，量级估算准确度在-50%到+100%之间。