Operations Management 101: Project Management Ops Earned Value Management Planned Value Earned Value Actual Cost CPI SPI

What This Is

Earned Value Management (EVM) is a project management technique that measures project performance by comparing actual progress to planned progress. It helps organizations track costs, schedule, and performance by calculating three key metrics: Planned Value (PV), Earned Value (EV), and Actual Cost (AC). EVM is widely used in construction, aerospace, and IT projects, but its principles can be applied to any operation where projects are executed.

For example, consider a construction project where the planned value of a building is $1 million, and the actual cost incurred so far is $600,000. If 40% of the work is completed, the earned value would be $400,000 (40% of $1 million). This indicates that the project is under budget and ahead of schedule.

Key Formulas & Frameworks

• Planned Value (PV) = Budgeted Cost of Work Scheduled (BCWS): The planned value is the budgeted cost of work scheduled to be completed by a specific date.
• Earned Value (EV) = Budgeted Cost of Work Performed (BCWP): The earned value is the budgeted cost of work performed to date, which is usually calculated as a percentage of the planned value.
• Actual Cost (AC) = Actual Cost of Work Performed (ACWP): The actual cost is the actual cost incurred to date, which includes labor, materials, and overhead costs.
• Cost Performance Index (CPI) = EV / AC: The cost performance index measures the efficiency of cost management by comparing earned value to actual cost.
• Schedule Performance Index (SPI) = EV / PV: The schedule performance index measures the efficiency of schedule management by comparing earned value to planned value.
• Earned Value Management Formula: EV = (BCWP / BCWS) × PV: This formula calculates the earned value by comparing the budgeted cost of work performed to the budgeted cost of work scheduled.

Step-by-Step Application

1. Calculate Planned Value (PV): Determine the budgeted cost of work scheduled to be completed by a specific date.
2. Calculate Earned Value (EV): Determine the budgeted cost of work performed to date, usually as a percentage of the planned value.
3. Calculate Actual Cost (AC): Determine the actual cost incurred to date, including labor, materials, and overhead costs.
4. Calculate Cost Performance Index (CPI): Divide earned value by actual cost to measure the efficiency of cost management.
5. Calculate Schedule Performance Index (SPI): Divide earned value by planned value to measure the efficiency of schedule management.

Common Mistakes

• Mistake: Confusing Earned Value (EV) with Actual Cost (AC).
• Correction: Earned Value (EV) is the budgeted cost of work performed to date, while Actual Cost (AC) is the actual cost incurred to date.
• Mistake: Not considering the impact of scope changes on Earned Value (EV).
• Correction: Scope changes can affect the budgeted cost of work performed, which should be reflected in the Earned Value (EV) calculation.
• Mistake: Not using a consistent basis for calculating Earned Value (EV).
• Correction: Use a consistent basis, such as a calendar month or a specific project milestone, to calculate Earned Value (EV).

Exam / Certification Tips

• Tricky distinction: Cost Performance Index (CPI) vs. Schedule Performance Index (SPI). CPI measures cost efficiency, while SPI measures schedule efficiency.
• APICS terminology trap: Earned Value (EV) is not the same as Actual Cost (AC). Earned Value (EV) is a measure of project performance, while Actual Cost (AC) is a measure of project expenditure.
• Six Sigma terminology trap: Earned Value (EV) is not the same as Cost of Quality (COQ). Earned Value (EV) measures project performance, while Cost of Quality (COQ) measures the cost of defects and non-conformities.

Quick Practice Problem

A construction project has a planned value of $500,000 and an actual cost of $300,000. If 60% of the work is completed, what is the earned value?

Answer: $300,000 (60% of $500,000) Explanation: The earned value is the budgeted cost of work performed to date, which is 60% of the planned value.

Last-Minute Cram Sheet

• Earned Value (EV) = Budgeted Cost of Work Performed (BCWP)
• Planned Value (PV) = Budgeted Cost of Work Scheduled (BCWS)
• Actual Cost (AC) = Actual Cost of Work Performed (ACWP)
• Cost Performance Index (CPI) = EV / AC
• Schedule Performance Index (SPI) = EV / PV
• Earned Value Management Formula: EV = (BCWP / BCWS) × PV
• ⚠️ Earned Value (EV) is not the same as Actual Cost (AC)
• ⚠️ Cost Performance Index (CPI) measures cost efficiency, while Schedule Performance Index (SPI) measures schedule efficiency
• ⚠️ Earned Value (EV) is a measure of project performance, while Actual Cost (AC) is a measure of project expenditure