A reliable bid comparison runs through the same checklist every time, because the items that get skipped are the items that become change orders. Here is the structure a thorough general contractor uses to level and compare bids, organized by what to verify on each bid before it goes into the comparison.
Scope and Inclusions
Confirm each bid covers the full trade scope from the plans and specifications. Map every line item to a common scope structure. Identify any required scope category that appears in the bid with no price, or doesn't appear at all. For each gap, insert a plug number so the comparison reflects true cost.
Exclusions and Assumptions
Read the exclusions section of every bid — and treat silence as exclusion. Note every "by others," "not included," and assumption a sub states. These are where the sub has told you, sometimes in fine print, that they're not covering something. An exclusion in one bid that's included in another is a direct scope difference that has to be priced into the comparison.
Quantities, Qualifications, and Interfaces
Verify quantities against the documents — a present line item with an under-quantity is a hidden gap. Confirm qualifications: licensing, bonding, capacity, and references. And cross-reference bids at trade interfaces — the connections between electrical and mechanical, structural and envelope — to catch the work that falls between scopes. The AI agent runs this entire checklist automatically against every bid. It's demonstrated at omnionlinestrategies.com/ai-agent-construction-bid-leveling.