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Project Cost Control: Steps, Guidelines, and Oversight
Project Management · Chapter 4: Financial Planning and Cost ManagementSection 4.4 · lesson 28 of 7313 min · free with a free account
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In this lesson
A six-step cycle for tracking, analyzing, and approving project spending.
- Apply the six-step cost control cycle of monitor, compare, analyze, decide, forecast, and record
- Calculate cost variance as baseline minus actual and separate timing effects from genuine overruns
- Forecast total cost at completion under one-off and continuing overrun assumptions
- Explain how thresholds, approval limits, reserves, and oversight roles govern changes to spending
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Transcript
Everything said in the video, section by section (1,588 words). Read along, or search it.
Opening Question
Twelve Thousand Dollars Over at Midyear
Dana Reyes is managing a $240,000 renovation of the playground in Marrowfield's park. At the end of the second quarter, the baseline called for $90,000 of spending so far. The actual is $102,000. That's $12,000 over: 13.3 percent, which is red under the department's thresholds. The sponsor will want to know, fast. Is the project really overrunning? Or is something else going on? Answering that is what cost control is for.
Purpose
Control Is Not the Same as Cutting
Cost control is monitoring spending, comparing it with the approved cost baseline, and managing changes to that baseline. It has three purposes. Keep spending within the baseline. Make sure any change to the baseline is deliberate, analyzed and approved. And prevent unapproved spending by people without the authority. Control isn't the same as cutting cost. A project that spends exactly its plan while delivering the wrong thing isn't well controlled. One that spends more, with approval and a documented reason, is.
Steps One and Two
Monitor Actuals and Compare Like With Like
Cost control runs as a six-step cycle, every reporting period. Step one: monitor. Gather the actual cost for the period. Include committed cost: money already promised through orders or contracts, but not yet paid. An overrun often shows in commitments weeks before it shows in payments. Step two: compare actuals with the baseline for the same period and the same cost lines. Two conditions make it valid. The periods must match: three months of spending against four months of baseline means nothing. And the baseline must be the current approved version.
Step Three
Timing Variance or Genuine Overrun
Step three: analyze the variance. Here the convention is baseline minus actual. Positive is favorable: less was spent than planned. Negative is unfavorable. The percentage is the variance divided by the baseline. Other sources use the reverse sign, so every report states its convention. But the number isn't the end. The key question: is this timing, or a genuine overrun? A timing variance comes from spending earlier or later than planned, and reverses later without changing the total. A genuine overrun won't be recovered: the work costs more. Telling them apart takes evidence: purchase orders, delivery dates, the schedule. And a large favorable variance gets the same question, because it may mean work wasn't done.
Period Versus Cumulative
Two Views That Tell Different Stories
Grace Lin from the finance office shows how period and cumulative views can tell different stories. Quarter one: baseline 30,000, actual 33,000. Variance minus 3,000: 10 percent unfavorable. Quarter two: baseline 60,000, actual 57,000. Plus 3,000: 5 percent favorable. Cumulatively, 90,000 against 90,000: zero. Looking only at quarter one is alarming. Looking only at the cumulative figure shows nothing to discuss. The period shows where something happened; the cumulative shows where the project stands.
Line-Level Control
A Kitchen Refit Total Hides a Red Line
Control works at the line level. A kitchen refit has five cost lines. Design fees: 2.5 percent over, within tolerance. Demolition: 7.5 percent under, favorable, but large enough to need an explanation. Painting: exactly on plan. Electrical: 7 percent over, amber. Fittings: 12 percent over, red. The total is 4,560 dollars over a 74,000 baseline: 6.2 percent, amber. That total hides a red line and a big favorable one, which is why control works line by line.
Steps Four to Six
Decide, Forecast, and Record
Step four: decide. Accept the variance, if it's small or a timing effect that will reverse. Correct it, by acting on the cause. Or request a baseline change, if the overrun is genuine and can't be absorbed. Step five: update the forecast of total cost at completion. Suppose the baseline is 200,000, the baseline for work done is 80,000, and actual cost to date is 88,000. If the overrun was a one-off: 88,000 plus the remaining 120,000 is 208,000. If overspending continues, scale the remainder by 88 over 80, or 1.1: 132,000, for 220,000 in all. Write down the assumption. Step six: record the variance, the analysis, the decision and the forecast in a log, so the next round doesn't start without memory. Then the loop begins again.
Quick Check
Forecast When Overspending Continues
Quick check. A project's baseline is $100,000. The work done so far was baselined at $40,000, but actually cost $50,000. If the overspending continues at the same rate, what's the forecast at completion? Pause, and decide. One hundred twenty-five thousand. The remaining baseline is sixty thousand, scaled by fifty over forty, one point two five: seventy-five thousand. Add the fifty thousand spent. One hundred ten thousand assumes the overrun was a one-off. One hundred fifty adds the fifty thousand spent to the full baseline, counting the finished work twice.
Thresholds and Limits
Tolerance, Amber, Red, and Steering Group
Thresholds are pre-agreed variance levels that trigger stated actions, set in the cost management plan. Approval limits cap what each role may approve alone. Within tolerance, up to 5 percent unfavorable: the project manager handles it, in the regular report. Amber, over 5 up to 10 percent, or actions up to $5,000: the project manager acts, informs the sponsor and finance, and writes a cause analysis within five working days. Red, over 10 percent, or actions from $5,001 to $25,000: the sponsor decides, within three working days. Above $25,000, the steering group decides. Where the percentage and the amount point to different tiers, the more severe one applies. Set bands with the estimates in mind. Tighter than the estimate's accuracy, they fire on noise. Much looser than the contingency, the reserve can run out before anyone's warned.
Common Failure
Splitting Purchases Under a Limit
Under these limits, a $4,000 unplanned cost is the project manager's to approve. An $18,000 one needs the sponsor. A $40,000 one, the steering group. A familiar failure is splitting: one $18,000 purchase becomes four orders of $4,500, each under the project manager's limit. The remedy: the cost management plan says limits apply to the total of related spending, and finance watches for repeated amounts just below a limit.
Quick Check
Three Orders of Twenty-Five Hundred
Quick check. One unplanned purchase of $7,500 arrives as three separate orders of $2,500. May the project manager approve it alone? Pause, and decide. No. The limit applies to the whole commitment. Seventy-five hundred is above the project manager's five thousand, so the sponsor decides. Splitting it into orders under five thousand doesn't change who must decide.
Cost Change Requests
Baseline Changes and Reserve Routes
A cost change request formally proposes altering the baseline: what changes and why, the cost effect, any schedule or scope effect, alternatives considered, and where the money comes from. Impact analysis asks what else would move. Approval follows the limits, and the baseline is re-issued as a new version. Reserves have their own route. The project manager may apply contingency to the identified risks it was set for, within the limit, with a log entry. The baseline total doesn't change. Management reserve sits outside the baseline. Only management can release it, and the amount is then added to the baseline by a change. In the kitchen refit, the 3,600-dollar fittings overrun came from a supplier price rise. The request offers two options: accept it, or cheaper fittings saving 1,500, that wear out sooner. It proposes covering the cost from contingency, leaving 9,000 minus 3,600: 5,400 for the remaining risks. Because the variance is red, the sponsor approves, and it's logged.
Prevention
Purchase Authorization and Segregation of Duties
Prevention is cheaper than correction. A purchase authorization requires a named approver to confirm, before an order is placed, that the line has budget, and the amount is within their limit. Segregation of duties means the person who commits spending isn't the one who approves payment or records it, so no single person can both create and hide an error.
Oversight Roles
Sponsor, Finance, and Audit
Three roles oversee control. The sponsor is accountable for the business case, approves changes in the sponsor tier, and decides whether the project continues. The finance function keeps the accounts, checks coding, confirms funds are available, and supplies actual cost figures independent of the project team. Audit is an independent review of whether controls were followed and records are reliable. It tests a sample of transactions, and findings like repeated approvals just under a limit can change the limits. How tightly to hold authority is disputed. Centralized control limits error and unauthorized spending; distributed control speeds decisions and uses local knowledge. The evidence is mixed. How much autonomy people ought to have, against how much oversight, is a question of values.
Reporting Guidelines
Cadence, Consistent Definitions, Early Warnings
Reporting guidelines turn these roles into routine. Set the cadence by pace and risk: monthly for a steady project, weekly for a fast or red one. Keep definitions consistent: the sign convention, the baseline version, the treatment of commitments. Base forecasts on evidence, not hope. And report overruns early, at amber, not after they turn red. A useful report repeats the same items: baseline and actual, by period and cumulatively; commitments; variance with its band; the forecast and its assumption; reserve balances; the biggest variances; and decisions needed.
Back to the Playground
Nine Thousand of Timing, Three of Overrun
Back at the playground, Dana compares invoice dates with the plan. A $9,000 delivery of safety surfacing was ordered early, to lock in a price. It was baselined for quarter three. That's timing. The other $3,000 came from extra excavation after an old footing was found: a genuine overrun, but only 3.3 percent, within tolerance. Because the raw figure was red, she tells the sponsor and finance at once, with the analysis attached. She applies $3,000 of contingency, under her $5,000 limit, logs it, and forecasts a $9,000 underspend in quarter three. The trade-off: the sponsor first saw an alarming number, and if her timing claim proves wrong, it becomes an overrun. Early disclosure with evidence beats a late correction.
Key Takeaways
The Six-Step Cost Control Cycle
To recap. Monitor, compare, analyze, decide, forecast and record, every period. Variance is baseline minus actual, in amount and percentage, with the convention stated. Separate timing from genuine overruns with evidence, and read lines, not just the total. Limits apply to whole commitments, and reserves follow their own approval routes.
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About Project Cost Control: Steps, Guidelines, and Oversight
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What is purchase splitting and how do approval limits prevent it?
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