Provisional quantity
According to NRM 2, RICS new rules of measurement, Detailed measurement for building works, published by the Royal Institution of Chartered Surveyors (RICS) in April 2012, the term provisional quantity means:
| ...a quantity which cannot be accurately determined (i.e. an estimate of the quantity). |
NRM2 suggests that:
|
Where work can be described and given in items in accordance with the tabulated rules of measurement but the quantity of work cannot be accurately determined, an estimate of the quantity shall be given and identified as a ‘provisional quantity’. Work items identified as a ‘provisional quantity’ shall be subject to remeasurement when they have been completed. The ‘approximate quantity’ shall be substituted by the ‘firm quantity’ measured, and the total price for that item adjusted to reflect the change in quantity. Where the variance between the ‘provisional quantity’ and the ‘firm quantity’ measured is less than 20 per cent, the rate tendered by the contractor shall not be subject to review. Where the variance is significant (i.e. 20 per cent or more), the rate can be reviewed to ensure that the rate is fair and reasonable to both the employer and contractor. |
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Civil engineers and environmental methods of construction
Can the profession use its skills to save the world from climate change?
How faulty science resulted in sanitation reform.
Conserving the Hilda Besse Building
Improving facilities, accessibility and overall appearance.
BSRIA IAQ topic guide published
Free download of TG 12/2021 available.
Electrotechincal mentors wanted
TESP works with The Youth Group to form skill sharing network.
OpenBuilt supply chain technology in development
Big tech collaborates on platform for the built environment.
Concerns raised over Future Buildings Standard
Letter signed by 21 organisations sent to MHCLG.
The infrastructure planning process
A look at the Government's strategic approach.
Steps to help reduce the spread of infection inside buildings.
Urban exploration and construction
This social media-centred hobby can be both dangerous and illegal.
Millwork wall treatment with a long and illustrious history.
Weekly workplace noise estimator tool
HSE introduces cumulative exposure calculator.
The Edwardians and their houses.
Cut off from civilian life for over 900 years.
Receive the Designing Buildings newsletter
Click the button to subscribe.