The challenge of accurately estimatingcost and schedule is certainly part of the problem.
精确评估成本和日程的挑战已经成为主要的问题。
2
The cost per kilowatt hour of solar power is figured by estimating the total power output of the solar panel over its 20 - to 25-year warranty.
太阳能输出电能的每度电成本是通过估算太阳能板在其20到25年的保修期间总输出电能来计算的。
3
Inevitably, as software projects, software products, and it environments all become more and more complex, so, too, does the task of estimating what they will cost and how long they will take.