关于第一个问题好像有专门的参数的 叫SPI,schedule performance index=EV/PV 这里的EV是budgeted cost of work performed PV是budgeted cost of work scheduled 这里是通过在工程上的花费去判断是否over time了 给大家一个简单的sample Suppose the budget is Week 1 $20,000 Week 2 $22,000 Week 3 $32,000 At the end of the second week we have only paid out $30,000 Does that mean we are $12,000 ahead of budget? If we have done all the work planned for week 1 and 25% of the work planned for week 2 … we have only completed what should have cost $20,000 + $22,000/4 = $25,500 So we are actually overspent by $4,500! Earned value = sum of the (up to date) budget for each of the completed items [$25,500] Cost performance indicator = Earned value/actual spend [0.85] Schedule performance indicator = earned value/planned spend [0.61],A SPI of 1 means the project is on schedule. Greater than 1, then the project is ahead of schedule and less than 1 means the project is behind schedule. Estimated time of completion = original time estimate/schedule performance indicator [3 weeks/0.61 = 4.9 weeks]
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