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Estimating & Biddingaka: SOWaka: work scope

Scope of Work

In Plain English

A description of exactly what work the contractor is responsible for completing.

Definition

The scope of work is a detailed description of all tasks, deliverables, and requirements that a contractor must perform under a contract. A clearly defined scope prevents disputes by establishing mutual understanding of what is and is not included. Scope gaps and ambiguities are primary causes of change orders and claims.

Why It Matters in Bidding

Scope of work is the single most disputed element in construction bidding, because what one trade assumes is included and what the next assumes belongs to someone else creates the scope gaps that drive change orders and claims. Estimators perform careful scope review during bid leveling to ensure competing subcontractor quotes cover identical work, since a low number that omits a key item is not actually low. A tightly written scope of work in the bid package protects margins by preventing buy-out surprises after award.

Example

During bid leveling the estimator discovered that the low electrical sub had excluded the fire-alarm system from its scope of work, making a competitor's higher quote the true apples-to-apples low bid.

Related Terms

Bid DocumentsSpecificationChange OrderBid Package

Frequently Asked Questions

Scope of work defines which tasks and deliverables a contractor is responsible for, drawing the boundary of who does what. Specifications define how that work must be performed, including materials, quality standards, and methods. A bid can have a complete scope but still misprice it if the specs are misread, so estimators must reconcile both.
When the contract documents leave an item ambiguous or assign it to no one, neither the contractor nor a subcontractor prices it during bidding. When that work surfaces in the field, performing it is extra work outside the agreed scope, justifying a change order and added cost. Clear, comprehensive scope definition is the cheapest way to avoid these disputes.
Leveling compares competing subcontractor quotes against a common scope checklist to confirm each covers the same inclusions and exclusions. Estimators add back any items a low bidder excluded so the comparison is apples-to-apples. This prevents awarding to a number that looks cheap only because it omits work, which would resurface as a costly change after buy-out.

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