Definition
A scope gap is an item your scope of work (SOW) requires that a bidder left out of their proposal — not priced, not quantified, not even excluded in writing. It is the opposite of scope creep, which is an item a bidder quoted that was not in your SOW. A bid with a scope gap reads as cheap, but it is cheap because it is incomplete: you still owe that work to the owner, so the cost lands on you later as a change order. The fix is to add the missing scope back and re-total the bid before you compare it to anyone else.
A worked example
You receive five bids on a paving package with a $1.20M field estimate. The apparent low bidder comes in at $1,142,000 — about 5% under the field and $36,000 below the next bid. Reading their line items against your SOW, you find no line for joint sealing, a $28,000 item every other bidder priced.
| Bidder | Submitted total | Reconciled total |
|---|---|---|
| Sub A (apparent low) | $1,142,000 | $1,170,000 (+ $28,000 joint sealing) |
| Sub B | $1,178,000 | $1,178,000 |
| Sub C | $1,185,000 | $1,185,000 |
Add the omitted $28,000 back to Sub A and the reconciled total is $1,170,000 — still close, but Sub A is no longer the clear low bidder. The original $36,000 gap to Sub B was never real; $28,000 of it was just missing work. Award Sub A on the face number and you eat that joint sealing as a sole-source change order after they mobilize.
Why it matters when you evaluate sub bids
When you receive 5 to 15 bids per package, the lowest bottom-line total is the first thing a VP looks at — and a scope gap makes the wrong bid look like the winner. Comparing a complete bid to one missing $28,000 of work is comparing two different jobs. The honest comparison only exists after every bid is normalized to the same SOW, with missing and extra scope reconciled. Catch the gap at bid time and you have every bidder competing on the price of that line; miss it and you pay a single sub, mid-mobilization, with no competition.
How Bid Reasoner handles it
Bid Reasoner runs scope-coverage gap analysis on every bid you receive, in both directions at once. It maps each subcontractor's line items to your scope of work and flags missing scope (SOW items a bidder did not quote) and extra scope (priced items outside your SOW), each tied to the page of the proposal it came from. A bid that is low because it zeroed out a line shows up as a missing-scope flag, and the deterministic risk rules often catch the same hole as a peer outlier — two independent signals on one gap. The reconciled totals feed the leveling sheet and the auto-generated award memo, so the page citation behind every gap is there to defend the pick.