Why is earned value better than comparing budget to actual spend?

Budget-versus-actual compares two numbers and hides the one that matters. If a project budgeted six million dollars by month eight and has spent six point three million, it looks slightly over. But that comparison never asks how much work was actually done for the money. Earned value adds that third number: the budgeted worth of completed work. Once you know only five point four million of work is finished, the picture changes. The project is not slightly over, it is both behind schedule and over budget, and the gap is measurable rather than a hunch.

Do I need expensive software to run earned value management?

No. EVM is arithmetic, not software. The whole method rests on three numbers and a handful of subtractions and ratios, which is why a disciplined team can run it in a spreadsheet. What software buys you is not the math but the consistency: a single source for the baseline, an honest and repeatable way to measure percent complete, and the discipline to recompute every period instead of once a quarter. The hard part of EVM has never been the formulas. It is measuring earned value honestly, period after period, without letting optimism creep into the percent-complete number.

What is the hardest part of earned value to get right?

Measuring earned value itself. Planned value comes straight from the baseline and actual cost comes from the accounting system, so both are hard to fudge. Earned value depends on how complete the work is, and percent complete is where judgment, and optimism, enter. A crew that reports eighty percent complete on work that is really sixty percent inflates earned value, which in turn flatters both the cost and schedule indices and hides a problem until it is too large to recover. The fix is an objective rule for percent complete, agreed before the work starts, rather than a gut feel collected at month end.

Construction Glossary · Earned Value

What Is Earned ValueManagement?

One method that measures cost and schedule at the same time, from three numbers you already track. Here is what it is, the two questions it answers, and a worked example you can follow line by line.

Definition

Earned value management (EVM) is a project-controls method that measures cost and schedule performance from three numbers: planned value, earned value, and actual cost. Comparing them tells you, in dollars, whether a project is ahead or behind schedule and over or under budget.

The three numbers EVM runs on

Everything in earned value comes from these three figures, read at the same moment in time (the data date). Get them honest and the rest is arithmetic.

Planned ValuePV

$6.0M

What you planned to have spent by the data date (month 8 of a $12M job, 50% planned).

Earned ValueEV

$5.4M

The budgeted worth of the work actually finished so far (45% complete).

Actual CostAC

$6.3M

What you have actually spent to get that work done.

Each of these is defined in full in planned value, earned value & actual cost.

The two questions it answers

EVM turns the three numbers into two readings. One is about money, one is about time, and each comes as both a dollar variance and a ratio you can compare project to project.

Are we over or under budget?

Compare the worth of work done against what it cost. Cost variance is EV minus AC; the cost performance index is EV divided by AC. Below 1.0 means each dollar is buying less than a dollar of progress.

Cost variance & CPI

Are we ahead or behind schedule?

Compare the worth of work done against what should have been done. Schedule variance is EV minus PV; the schedule performance index is EV divided by PV. Below 1.0 means the work is lagging the plan.

Schedule variance & SPI

A worked example, line by line

Take a $12.0M project at month 8. The plan said 50% of the budget would be earned by now. Only 45% is done, and $6.3M has been spent. Four subtractions and ratios turn that into a verdict.

Planned Value (PV): $6.0M50% of $12.0M planned by month 8
Earned Value (EV): $5.4M45% actually complete × $12.0M
Actual Cost (AC): $6.3Mcost booked to date
Cost Variance (CV = EV − AC): −$0.9Mover budget
Schedule Variance (SV = EV − PV): −$0.6Mbehind schedule
CPI (EV ÷ AC): 0.86$0.86 earned per $1 spent
SPI (EV ÷ PV): 0.9090% of planned pace

Extend the trend and the forecast finish is about $14.0M (BAC ÷ CPI), a projected $2.0M overrun. See the S-curve for how that reads over time.

The one chart EVM draws: our example project lands in the lower-left, behind schedule and over budget.

Why not just compare budget to actual?

The usual two-number comparison is blind to how much work the money actually bought. Earned value adds the missing third number.

Question	Budget vs actual	Earned value
Numbers used	Budget, actual spend	Planned value, earned value, actual cost
Our example reads	$6.0M planned, $6.3M spent, so "slightly over"	$5.4M earned, so behind and over, by a known amount
Schedule insight	None	SV / SPI tell you the pace
Forecast	Guesswork	EAC from CPI: about $14.0M

Where earned value goes wrong

Treating money spent as progress earned

Spending roughly half the budget does not mean half the work is done. Earned value is the budgeted worth of completed work, not the cash that left the account. Confusing the two is the single most common EVM error and it always flatters the numbers.

Measuring percent complete by feel

If percent complete is a month-end gut estimate, earned value is fiction and so is every index built on it. Agree an objective rule for each work type before the work starts: units installed, milestones hit, or a weighted-step method.

Running it without a frozen baseline

Planned value only means something against a baseline that does not move. If the plan is quietly re-cut every month to match reality, the schedule variance is always near zero and the method tells you nothing.

How POD handles earned value

POD computes earned value rather than asking you to key it in. It holds the budget as an immutable baseline, reads progress from the pay applications and confirmations you already produce, and derives CV, SV, CPI, and SPI from the three source numbers each period. Because the baseline is versioned, the schedule variance stays honest even after an approved change, and the S-curve is drawn from the same figures the indices use.

The full EVM guide Forecasting the finish (EAC)

Frequently asked questions

See it on a live project

POD turns the pay apps and progress you already report into a computed earned-value picture, baseline and forecast included, without a controls analyst keying numbers.

Read the EVM Guide Back to the Glossary