Quantity take-offs (QTO) are a detailed measurement of materials and labor needed to complete a construction project. They are developed by an estimator during the pre-construction phase. This process includes breaking the project down into smaller and more manageable units that are easier to measure or estimate.

The level of detail required for measurement may vary.[1] These measurements are used to format a bid on the scope of construction. Estimators review drawings, specifications and models to find these quantities. Experienced estimators have developed procedures to help them quantify their work.

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