What it means
A project team receives a request to add work. The proposed price looks small, but it may require extra testing, supplier time and support later.
Project change request cost impact review rate measures the share of eligible change decisions supported by a documented assessment of their financial effect, so define the eligible change, since a cosmetic note may not need a full estimate while a new customer deliverable usually does. PMI discusses scope change as an investment decision with potential need for added funding and time.
APQC describes engineering change orders as documented proposals that identify affected products and seek review from change-control authority. These examples support deliberate impact review, not a universal approval threshold, and cost review should happen before approving or rejecting the change unless a documented emergency process applies.
Capture direct cost, as labour, materials, equipment and subcontractor charges may rise or fall, and indirect impact, since rework, testing, warranty and operational support can matter even when no new material is bought. Check schedule cost, because a delay or acceleration can change overtime, mobilization or financing needs.
Check revenue and price too: the customer may agree to pay, but a proposed quote is not approved recoverable revenue. Preserve the baseline by showing the original budget and forecast to complete before adding the change, and avoid double counting, since one subcontractor quote can appear in both direct cost and contingency if not reconciled.
Check assumptions, because a preliminary estimate with uncertain scope should show range and confidence, and consider alternatives, as a lower-cost way to meet the customer's need may exist with a different schedule or function. Record approvals, since project manager, finance and customer can have different authority for budget and contract terms.
Choose the denominator by counting proposed decisions above a declared materiality threshold or all formal requests, and define review carefully, because a field saying cost reviewed is weak without estimate, assumptions and responsible reviewer. A valid assessment can conclude no material cost change, but it must explain why, and a request awaiting vendor quotes should remain pending rather than quietly excluded.
Separate implementation, since a reviewed change can still overrun its estimate and actuals should be tracked later, and check currency and taxes, because multi-country procurement needs conversion assumptions and an estimate date while project pricing and tax treatment vary by location and contract, so seek specialist input. Avoid sunk-cost bias, as money already spent does not make new work automatically justified, and track rejected changes, because the cost estimate can explain rejection and help future planning without becoming authorized work.
Keep the version, since a scope revision after review may invalidate the estimate, segment risk so safety or compliance changes are not dismissed because their near-term cost is high, explain material financial effects to the client under the contract before making promises, and audit samples by comparing approved scope, estimate, funding decision and cost baseline update. Check savings claims, internal displacement and forecast timing: removing work may reduce the forecast, but cancellation charges or committed supplier capacity can offset savings; a change using existing staff still has an opportunity cost if it delays other committed work; and a change approved after a monthly forecast cutoff belongs in the next controlled baseline rather than silently rewriting the prior snapshot, so use this rate to make financial effects visible before project commitments are changed.
In practice
Real-world examples.
Example
Of 20 material change decisions, 18 include reviewed cost estimates and funding notes: 90%. The two without a review are listed with their proposed values so the exposure is visible.
Example
A no-cost change conclusion explains why the work uses existing capacity and needs no new materials. The reviewer still records the assumption, so the conclusion can be checked if staff availability changes.
Example
A revised scope adds external testing after review, requiring an updated cost assessment before approval. The earlier estimate is kept in the file but marked as superseded.
Formula
Calculation
Illustrative rate = eligible change decisions with valid pre-decision cost review / all eligible change decisions in the period x 100. Show pending estimates and cost ranges separately.
Worked example. In a fictional quarter, a project office takes 20 material change decisions. Of these, 18 include a reviewed cost estimate, assumptions and funding note, and two were approved with only a verbal price.
- Rate = 18 / 20 x 100 = 90%.
- The two unreviewed decisions are listed with their proposed values so management can see the financial exposure behind the 10% gap.Case study
Seen in the real world.
This entirely fictional case follows Sequoia Works. A customer requested an added testing step. The team initially quoted only technician hours, then found lab fees and schedule-related costs during review. It revised the estimate and sought the proper budget and customer decision before committing. The case is illustrative, not authority to increase a real price.
Watch out
Common mistakes.
- Treating an unreviewed quote as complete project cost.
- Counting a checkbox without assumptions or authorized reviewer.
- Using a prior estimate after the scope materially changes.
Questions
People also ask.
Does cost review authorize the change?
No. Budget and customer contract approval remain separate.
Can the result be zero cost?
Yes, when a documented assessment supports that conclusion.
Does a high review rate mean forecasts were accurate?
No. Compare estimates with later actuals separately.
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