Cost Early-Warning Model System of Large-Scale Construction Project

Table 1

Evaluation index of earned value management.

Index	Calculation formula	Judging procedure
CV	CV = BCWP − ACWP	Measure the level of cost management.; If CV < 0, it means that the project operation cost exceeds the expenditure; If CV ≥ 0, it means that the project operation cost saves expenses.
SV	SV = BCWP − BCWS	Measure the progress of the project.; If SV < 0, it means that the project progress is delayed; If SV ≥ 0, it means that the project progress is ahead of schedule.
CPI	CPI = BCWP/ACWP	Measures the execution level of the project budget.; If CPI < 1, it means that the cost exceeds the expenditure; If CPI ≥ 1, it means cost savings.
SPI	SPI = BCWP/BCWS	Measure the actual execution level of the project workload.; If SPI < 1, the actual progress is insufficient; If SPI ≥ 1, it means that the actual progress is ahead.