How do you check rework allowances in Berbera bids?

A rework allowance in a Berbera bid only means something when the bidder can show what correction work it covers and how the figure was built. Ask for the allowance as a separate line with its own labour, material and supervision build-up, plus the method statement behind it. A round sum with no working hides where competence and rework risk sit.

What should a rework allowance build-up show?

It should name the correction activity, then price the labour, material and supervision that activity needs.

The build-up is the evidence. Ask the bidder to state which defects the allowance is for, such as a poured element that fails a strength check, a joint that leaks, or a finish that has to come off and go back on. Each one should carry hours, crew size, the materials consumed and how the work will be supervised.

A figure built from a real rate has a spine. A figure that was never reasoned through bends. Ask what happens if two corrective activities overlap and the crew doubles up, and which assumed defect rate the number rests on. Push back if the answer is a shrug.

Ask whether the allowance has been reviewed by the person who will actually run the correction. An estimator who has never supervised remedial work may price it from a unit rate book alone. A percentage with no method statement behind it is a placeholder.

How does an unverified capability claim hide the risk?

It hides the risk by moving a real cost into an unnamed contingency, where it stays unpriced and unmanaged.

A bidder can list a laboratory, a testing house, a supervisor and a site it says it has worked on. None of that proves the correction work was actually priced. A claim of experience is not the same as a costed method.

Check the experience. Ask for a walk round a past site, or a short written account of a correction that went wrong and what it cost. A bidder who did the work can describe the sequence and the crew. One who did not will talk around it.

If the allowance is small and the rest of the bid is thin, the gap is the risk. The correction work will simply appear later, without a line in the contract to pay for it.

That gap is the reason to compare bidders on the depth of the build-up, not just the bottom line. A lower total with a hollow allowance carries the same job, with the correction cost sitting somewhere the contract cannot see it.

How do you close the gap before award?

Close it by making the allowance traceable in the tender documents: a named build-up, a stated review by the works supervisor, and records.

For each bidder, ask for three things in writing. A method statement covering how the correction will be done, a build-up of the labour, material and supervision, and past evidence of similar correction work: a test certificate, an inspection record, or a written account. Ask two or three bidders the same questions, so you can compare answers.

State, in the tender documents, how the allowance is drawn down and what records trigger a claim. Then a capable bidder self-selects, and a bidder with no real allowance is exposed before the contract, not after. Where the build-up turns on ground conditions or water, ask the municipal engineer's office what records it holds for the site, and whether a laboratory or testing house has done relevant work. Confirm all technical limits against the project's engineer and specification, not against general practice.

What to do next

Before you compare totals, circulate one written request to every bidder for the same three items: the named defect the allowance covers, the labour and material build-up, and one past correction record. Set a short deadline and compare the answers side by side, not just the final figure.