If your firm's prequalification scorecard weighs annual turnover heavily because it's the easiest number to verify from audited financial statements, it's worth asking whether that's actually the criterion doing the most work in predicting whether a contractor delivers on time - because the easiest factor to document and the most predictive factor are not reliably the same thing.
| Criterion | Typical predictive value for on-time delivery |
|---|---|
| Annual turnover / financial size | Weak on its own - correlates more with capacity to take on the work than execution discipline |
| Past project on-time completion rate | Strong - the single best predictor across most prequalification studies |
| Current workload / resource availability | Strong - an overcommitted contractor is a common and underweighted delay risk |
| Safety and quality certifications | Moderate - correlates with process discipline generally, but not schedule performance specifically |
Why Current Workload Is the Most Underused Predictive Check
A contractor's current commitment level - how many other active projects they're simultaneously running, and how stretched their key site management personnel already are - is one of the easiest checks to add to a prequalification process and, simultaneously, one of the most commonly skipped. It's a genuinely predictive factor precisely because it captures a risk that past performance history and financial statements simply don't reveal: a contractor with an excellent historical on-time delivery record can still perform poorly on a new project if they've taken on considerably more concurrent work than their key management personnel can realistically oversee well.
A Scenario Illustrating This Gap
Picture a developer prequalifying contractors for a new commercial project using a standard scorecard weighted heavily toward turnover and past project references. A contractor with an excellent historical track record and strong financials scores highly and wins the tender - but at the point of award, that same contractor has just taken on two other large projects in quick succession, stretching their most experienced site managers across three concurrent sites rather than the one or two they'd normally run at any given time. The prequalification process, having never asked about current workload directly, had no way of surfacing this risk, and the developer only discovers the strain partway through construction when site management responsiveness noticeably declines - not because the contractor's underlying capability changed, but because their capacity was simply spread further than it could support well. A prequalification process that explicitly asked about current committed workload at the point of tender evaluation would have surfaced this specific risk before the contract was awarded, rather than after.
Why Scoring Should Differ by Project Type
The weighting that best predicts performance on a fast-track interior fit-out - where speed of decision-making and subcontractor mobilisation matters enormously - genuinely differs from what predicts performance on a complex structural project, where technical depth and coordination discipline matter more than raw speed. A single generic prequalification scorecard applied uniformly to every project type inevitably loses predictive accuracy for whichever project types don't closely match the profile the scorecard was originally designed around.