Anyone who bids public work knows the routine. You key your prices into the owner's workbook and trust the rest. The formulas behind those cells decide who's low, and nobody traces them in bid week.
One case on our Try page: a streetlight and signal maintenance bid form. Yesper traced its 15 formulas against the basis of award and drafted the pre-bid question. One row pulls the wrong price and carries no weight, so the monthly lump sum never counts. It should be 41% of the bidder's evaluated price. The error reverses the ranking.
You ask the owner before the question deadline instead of pricing around the error. It turns up while an addendum can still correct the form, not in the bid tab. Same for the rest of the Try page: markup against the evaluation quantities, a pre-bid cross-check of plans and specs.
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Yesper is the AI civil engineer for construction and infrastructure. AFRY, COWI, NRC Group and other Nordic firms use it to halve the time on a study, rerun calculations in minutes, and catch errors that would otherwise slip through. Get in touch if you'd like to see what it can do for you.
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