Buradasın

CPI and SPI Project Performance Metrics

Yapay zekadan makale özeti

Fundamentals: Earned Value Management combines scope, schedule, and cost information
Planned Value (PV) represents authorized budget for scheduled work
Earned Value (EV) measures value of work actually completed
Actual Cost (AC) represents amount spent to perform work
CPI: CPI compares earned value to actual cost
CPI = EV/AC, where 1.0 means budget is on track
Values above 1.0 indicate underbudget, below 1.0 indicate overbudget
Helps identify spending efficiency across project lifecycle
SPI: SPI measures time efficiency by comparing earned value to planned value
SPI = EV/PV, where 1.0 means schedule is on track
Values above 1.0 indicate ahead of schedule, below 1.0 indicate delays
Allows comparison of projects of different sizes and budgets
Key Differences: SPI focuses on time efficiency, CPI on cost efficiency
Both metrics can be used together for complete project health view
SPI is dimensionless, CPI is ratio-based
SPI can mask delays near project completion
Best Practices: Establish realistic baseline early
Update progress regularly
Use work-breakdown structures for detailed analysis
Combine with qualitative analysis and other metrics