AACE CCP Earned Value and Variance Interpretation

Earned value questions test interpretation, not arithmetic alone. You may need to calculate cost variance, schedule variance, CPI, or SPI, but the CCP-quality answer explains what the result means and whether the data is reliable enough for a decision.

Core signals

Use the basic relationships carefully:

• Planned value (PV): budgeted value of work planned by a point in time.
• Earned value (EV): budgeted value of work actually performed.
• Actual cost (AC): cost incurred for the work performed.
• Cost variance: EV minus AC.
• Schedule variance: EV minus PV.
• CPI: EV divided by AC.
• SPI: EV divided by PV.

A positive cost variance usually suggests cost efficiency against earned work. A negative schedule variance usually suggests less work has been earned than planned. But these indicators depend on credible progress measurement, current actual cost, and a valid baseline.

Interpretation before action

Do not recommend corrective action from one index alone. Ask:

• Is progress measured objectively or by rough percent complete?
• Are actual costs and commitments current?
• Has the baseline changed?
• Is the variance isolated or trending?
• Is the variance driven by scope, productivity, procurement, schedule logic, or timing?

Common distractors

The exam may offer a tempting formula answer that ignores the management implication. For example, if CPI is below 1.0 and SPI is also below 1.0, the project is both cost-inefficient and behind its planned earned progress. The next step is not automatically to rebaseline. It is to analyze cause, forecast impact, and recommend corrective action or escalation.

Sample Exam Question

A project has EV of 8.0 million, AC of 9.0 million, and PV of 10.0 million. Which interpretation is strongest?

A. The project is under budget and ahead of schedule.
B. The project has unfavorable cost and schedule signals, but the team should validate progress measurement and cost completeness before recommending action.
C. The project is behind schedule only because AC is greater than EV.
D. The project should be rebaselined immediately.

Best answer: B

Why: EV is lower than AC, so cost performance is unfavorable. EV is also lower than PV, so schedule performance is unfavorable. A professional response validates the data and then recommends action.

Why the others are weaker: A reverses the signals. C confuses cost and schedule measures. D jumps to a governance action before cause and legitimacy are established.