Project cost management__ Plan value_ Earned value_ Relationship among actual cost and Countermeasures

	Three parameter relationship	analysis	measures
1	SV<0 CV<0	Progress lags Cost overruns	Replace a group of inefficient people with efficient people , Catch up or parallel construction to catch up with the progress , Speed up the work while controlling the cost , Follow up quickly while controlling risks   （ The main idea is to change people ）
2	SV<0 CV=0	Progress lags The cost is flat	Increase the input of efficient personnel , Catch up or parallel construction to catch up with the progress （ The main idea is to add people ）
3	SV>0 CV=0	Ahead of schedule The cost is flat	Draw out some personnel , Increase key personnel （ The main idea is to draw people ）
4	SV>0 CV>0	Ahead of schedule Cost savings	If the deviation is small , Maintain the status quo , Strengthen quality control ; If the deviation is large , It shows that there are Jerry built , Correction required , Change the plan .