Review a capital project after approval: did the economics hold up?

A post-investment review compares what a capital project cost and delivered with what management approved. Preserve the original business case, including assumptions that later proved wrong. A review against a repeatedly revised budget can show whether the latest plan was met while concealing how far the decision moved from its starting point.

The Northern Ireland Department of Finance describes post-project review in terms of actual costs, realized benefits, and the original business case. Its procedures are written for the public sector, but the comparison is useful for a company reviewing equipment, a new facility, or a systems investment. Set the review date around when the expected benefit can be measured, and retain interim checks for material risks.

Collect approved purchase orders, invoices, internal implementation work, installation, training, testing, and transition costs. Reconcile the project schedule with the ledger and explain what was capitalized, expensed, or still accrued. Cash paid, accounting asset cost, and the full economic cost of implementation can differ. Label each measure instead of choosing whichever makes the project appear closest to budget.

Keep approved scope changes separate from unexplained overruns. A larger facility or added capability may justify extra cost, but the review should identify the revised decision and the person who approved it. Include unresolved supplier claims and remaining commitments. Closing a project code does not establish that all invoices or contractual obligations have been settled.

If the case promised lower scrap, compare usable output and material consumption on a consistent basis. If it promised faster processing, measure the task and its relevant volumes before and after the change. If it promised revenue, trace actual customer sales and contribution while considering other commercial changes. Avoid attributing every favorable movement after launch to the project.

Distinguish released capacity from cash savings. Saving staff time can create room for more work without reducing payroll. A cash saving needs an identifiable reduction in overtime, external support, headcount cost, or another payment. Capacity may still have value, but report it as capacity and show how management plans to use it.

Suppose a hypothetical project was approved at $250,000 with $100,000 of steady annual net cash benefits. A simple undiscounted payback would be 2.5 years under those assumptions. If cost becomes $275,000 and annual benefit becomes $90,000, the same simplified calculation is about 3.06 years. A launch delay would worsen the actual timing further.

That example assumes benefits are constant and ignores discounting, tax, residual value, and uneven payment timing. For the real review, preserve the original cash-flow model and compare its revised inputs. ACCA's investment appraisal guidance explains why the timing and content of cash flows matter to discounted evaluations. A simple payback change alone cannot establish whether the project created sufficient value.

Separate the backward-looking review from the next spending decision. Money already spent belongs in the performance record, but it cannot be recovered by approving another poor investment. Compare the future costs and benefits of completing, modifying, delaying, or stopping the remaining work. Include contractual exit costs and the consequences of leaving a partially implemented system or facility.

Identify which weak assumptions can be tested cheaply before committing more. A supplier acceptance test, measured production trial, or customer demand check may resolve uncertainty. Assign an owner and a deadline for that evidence. Keep a conditional approval conditional until the stated requirement is met.

Record which estimation errors were project-specific and which reveal a repeatable weakness. Examples include omitted implementation labor, optimistic ramp-up dates, missing maintenance costs, or benefits counted in two departments. Update the relevant approval question or cost schedule instead of adding a generic lesson about better communication.

Close the review with the supported result, unresolved measurement limits, remaining actions, and the next review date where benefits are still developing. Have finance and the operating owner agree the evidence. The file should support a future decision about the asset and improve the next business case, even when the original investment did not meet expectations.