上週軟體專案管理實務課程,第五組的炯佑同學特別上網找了有關於Earned Value Management的一些公式。肥蝦此處只是將PMBOK 2008上的有關公式整理一下,並且對於課堂上所舉出解釋EVM的圖形提出自己的看法;另外對於此次新加入的EAC預測計算式,也提出肥蝦的初步構想。(1)PMBOK 2008計算公式
Performance Measurement Analysis
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Term Name
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Short Name
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Definition
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Formula
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Planned Value
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PV
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PV is the budgeted cost for the work scheduled to be completed on an activity or WBS component up to a given point in time.
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Earned Value
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EV
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EV is the budgeted amount for the work actually completed on the schedule activity or WBS component during a given time period.
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Actual Cost
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AC
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AC is the total cost incurred in accomplished work on the schedule activity or WBS component during a given time period.
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Budget at Completion
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BAC
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Cost Variance
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CV
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CV=EV-AC
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Schedule Variance
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SV
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SV=EV-PV
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Cost Performance Index
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CPI
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CPI=EV/AC
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Cumulative Cost Performance Index
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CPIC
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The cumulative cost performance index is widely used to forcast project costs at completion.
CPIC equals the sum of the periodic earned value (EVC) divided by the sum of the individual actual costs(ACC)
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CPIC=EVC/ACC
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Schedule Performance Index
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SPI
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SPI=EV/PV
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