Earned Value Management (EVM) is one of the most talked-about, least-consistently-implemented disciplines in construction project controls. Most teams have heard of SPI and CPI. Fewer have a clear answer for what to actually look for when choosing software to run EVM on a real project. This guide covers both: the metrics themselves, and a practical checklist for evaluating a tool.

What EVM actually measures

At its core, EVM answers one question traditional progress tracking can't: not just "are we behind," but "how far behind, in both time and money, and where is it heading." It does this by comparing three numbers at any point in a project — Planned Value (what you expected to have spent/completed by now), Earned Value (what you've actually accomplished, valued at planned cost), and Actual Cost (what you've actually spent). The relationships between these three numbers produce every other EVM metric.

On a construction project specifically, this matters because schedule and cost are rarely in sync. A project can be on-budget and badly behind schedule, or on-schedule and badly over budget, and traditional percent-complete reporting doesn't distinguish between those two very different problems. EVM does.

The core metrics, explained plainly

SPI (Schedule Performance Index) — Earned Value divided by Planned Value. Above 1.0 means you're ahead of schedule; below 1.0 means you're behind. An SPI of 0.88 means you've completed roughly 88% of the work you planned to have done by this point.

CPI (Cost Performance Index) — Earned Value divided by Actual Cost. Above 1.0 means you're spending less than planned for the work completed; below 1.0 means you're over budget for that work.

EAC (Estimate at Completion) — A forecast of total project cost at completion, based on performance to date. There are multiple accepted ways to calculate it (CPI-based, a composite of cost and schedule performance, or adjusted by expert judgment), and different methods can produce meaningfully different forecasts — which is why it matters that software shows you the method being used, not just a single number.

ETC (Estimate to Complete) — How much budget is still needed to finish the remaining work, from today's data date forward. This is EAC minus what's already been spent.

VAC (Variance at Completion) — The difference between the original budget (BAC) and the current forecast (EAC). A negative VAC means you're forecast to finish over budget.

TCPI (To-Complete Performance Index) — The cost efficiency the remaining work needs to achieve to hit a specific budget target. This is the metric that tells you whether your target is still mathematically achievable, or whether the remaining work would need an unrealistic efficiency gain to get there.

A buyer's checklist for EVM software

When evaluating any EVM tool — not just ours — these are the questions worth asking:

Does it connect to your live schedule data, or require manual data entry? EVM calculated from a schedule someone has to manually keep updated is only as reliable as that manual process.
Does it show which EAC method is being used, or just a single black-box number? Given how much EAC methods can disagree with each other, transparency about the calculation matters more than the number itself.
Can you see the trend over time, not just a snapshot? A single EVM reading tells you where you are. A trend tells you whether the situation is improving or deteriorating — which is usually the more actionable information.
Does it flag data quality issues, or just calculate on whatever it's given? EVM is only as trustworthy as the underlying schedule and cost data. Software that can surface obvious data problems (missing actuals, illogical progress) is protecting the numbers it produces.
Is the reporting format usable by non-specialists? EVM terminology is dense. If only the project controls team can interpret the output, its usefulness to the wider project team and client is limited.
Does it integrate with the scheduling tool you already use, or does it require exporting/re-entering data from one system into another?

Common mistakes teams make evaluating EVM tools

Treating a single EAC number as ground truth. Different calculation methods can produce different forecasts from the same underlying data — a tool that hides this behind one number is hiding useful information, not simplifying it.

Choosing based on dashboard aesthetics over data connection. A polished chart built on stale or manually re-entered data is less useful than a plain one built on a live connection to the actual schedule.

Ignoring TCPI. SPI and CPI get most of the attention because they're the easiest to explain, but TCPI is often the more important number in a recovery conversation — it tells you whether the target you're reporting toward is still realistic.

Where P6 Intelligence fits

P6 Intelligence's Predictive Analytics module calculates EAC, ETC, VAC, and TCPI automatically from your live Primavera P6 data — connected directly to your schedule rather than requiring manual entry — and shows EAC using multiple calculation methods side by side (CPI-based, composite, and expert judgment) rather than a single unexplained figure. It also runs Monte Carlo simulation to produce P50/P80/P90 completion date forecasts, so schedule risk is reported with a confidence range instead of a single-point estimate.

Frequently asked questions

Do I need a separate EVM tool if I already use Primavera P6? P6 calculates some EVM metrics natively, but many teams still export to spreadsheets or specialist tools for forecasting and reporting. A tool connected directly to your live P6 data removes that export step for the EVM calculations it covers.

What's the difference between EAC and ETC? EAC is the total forecast cost for the whole project. ETC is only the remaining cost from today forward. EAC = Actual Cost so far + ETC.

Is EVM only useful for large or complex projects? The underlying math scales to any project size — the more useful question is whether your project has reliable, regularly updated cost and schedule data to calculate it from. Without that, EVM on a small project is no more reliable than EVM on a large one.

See it on your own data

Read more about how Predictive Analytics calculates these metrics, or book a demo to see EAC, ETC, VAC, and TCPI generated from a live Primavera P6 connection.

Earned Value Management Software: A Practical Buyer's Guide for Construction Teams