Earned Value Management (EVM)

Traditional project tracking compares money spent with money budgeted, but that comparison can be misleading. A project that has spent half its budget might be on track, ahead or badly behind, depending on how much work has actually been done. Earned value management solves this by measuring the value of work completed, called earned value, and comparing it with both the planned value of work scheduled to date and the actual cost incurred. The result is an objective view of whether the project is ahead or behind schedule and over or under budget.

EVM is required for many government and defense contracts and is widely used in construction, engineering and large IT programs. Its measures, such as the cost performance index and schedule performance index, allow projects of different sizes to be compared and provide early warning of overruns. For portfolio leaders and IT finance teams, EVM gives a disciplined way to forecast final costs and to spot projects that need intervention before overruns become large.

Definition of Earned Value Management

Earned value management is a method that integrates a project's scope, schedule and cost to measure performance and progress, using the relationship between planned value, earned value and actual cost.

It depends on a detailed baseline plan that assigns a budget to each piece of work over time, and on regular measurement of how much of that work has been completed. It is often used alongside RAG status reporting to give an objective basis for status ratings.

Key EVM Measures

Planned value (PV) is the budgeted cost of the work scheduled to be completed by a given date.

Earned value (EV) is the budgeted cost of the work actually completed by that date.

Actual cost (AC) is the amount actually spent on the work completed by that date.

Budget at completion (BAC) is the total approved budget for the project. These three values are usually plotted together over time, which makes it easy to see when performance starts to drift.

Variances, Indices and Forecasts

Cost variance (CV) equals EV minus AC. A negative value means the work completed has cost more than planned.

Schedule variance (SV) equals EV minus PV. A negative value means less work has been completed than planned.

The cost performance index (CPI) equals EV divided by AC, and the schedule performance index (SPI) equals EV divided by PV. Values below 1.0 indicate overspending or delay. For example, a CPI of 0.9 means the project is earning 90 cents of planned work for every dollar spent.

Estimate at completion (EAC) forecasts the final cost. A common formula is BAC divided by CPI, which assumes current cost performance continues. Other formulas adjust for schedule performance or assume that remaining work will be completed at the planned rate.

Importance of Earned Value Management in Strategic Portfolio Management

EVM provides an objective measure of progress. It replaces subjective percentage-complete estimates with a calculation based on completed work and its planned cost.

It gives early warning. Experience on large projects suggests that cost performance measured early in a project tends to be a reliable guide to the final result, so problems can be addressed while there is still time.

It also allows comparison across projects. Because CPI and SPI are ratios, projects of very different sizes can be compared on the same basis in portfolio reviews.

Earned Value Management and Financial Management

EVM forecasts help finance teams anticipate overruns and adjust budgets or contingency before they appear in actual spending.

The estimate at completion gives a more realistic view of final project costs than the original budget, improving the accuracy of portfolio and capital budgeting forecasts.

Comparing CPI across projects can reveal systematic estimating problems, such as particular types of project that consistently overrun.

Where projects are paid for under fixed-price or milestone contracts, EVM helps verify that payments match the work actually delivered.

Common Challenges

EVM requires a detailed, budgeted baseline and regular measurement of completed work, which can be costly to maintain for smaller projects. Most organizations therefore set a size or risk threshold above which EVM is required, often managed through project governance rules.

Measuring earned value is difficult when work is hard to quantify, such as research, design or agile development with changing scope.

EVM measures cost and schedule performance but not quality or value to the business, so a project can perform well on EVM while delivering the wrong result.