Measurement and payment are two closely linked aspects of managing a construction contract. Together they make sure the work completed is accurately quantified and the contractor is paid correctly for it.
- Measurement: the process of quantifying the work completed by the contractor, either for a specific period or for the whole project. It involves reviewing drawings, specifications and site progress records to establish the actual amount of work done and materials used. The quantity surveyor’s role is to make sure the measurements are accurate and consistent with the terms of the contract. On a measured contract, the quantities are valued using the rates in the Bill of Quantities (BoQ) or Schedule of Rates.
- Payment: the process of paying the contractor for the work completed, based on the measurements taken and the rates agreed in the contract. The quantity surveyor prepares the valuation that supports the payment certificate, showing the value of the work done, any deductions such as retention, and the total amount due to the contractor. The certificate is the basis on which the client releases funds to the contractor.
Measurement and payment are essential parts of quantity surveying. They help make sure the contractor is fairly paid for their work, while protecting the client’s interests by checking that the work completed matches the contract requirements. Managing them properly also keeps the financial relationship between client and contractor transparent and accountable, reducing the likelihood of disputes and supporting successful project delivery.
