Drawings and specifications do not align
A product may appear in the specifications but not on the plans, or a drawing note may conflict with a schedule. Both document sets must be reconciled and questions raised before bid submission.
Accessories are omitted
Supports, fasteners, sealants, trims, sleeves, curbs, controls and testing can represent meaningful cost even when the major equipment or finish quantity is correct.
Temporary and enabling work is missed
Protection, temporary utilities, access, scaffolding, phasing, shutdowns and selective demolition often fall between general and trade scopes.
Trade boundaries are unclear
Openings, firestopping, patching, painting, equipment connections and controls frequently create overlap or gaps between architectural and MEP subcontractors.
Addenda are only partially incorporated
Revised drawings must be compared against the prior set, not simply added to the estimate. Deleted scope, relocated work and specification changes require a documented revision process.
Protecting margin through review
A coordinated estimate includes scope notes, drawing references, exclusions and a final reconciliation against the bid documents. This documentation turns uncertainty into visible decisions before the contract is signed.