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] Related articles on Designing Buildings
Featured articles and news
Industry survey highlights persistent skills gap
Building engineering business survey by ECA in partnership with BESA, SELECT and SNIPEF.
IHBC Conservation Professional Practice Principles
Spotlighted in HEF Historic Environment Overview.
CIAT collaborates with CIOB, CIfA, Icon to launch The Arc
Helping clients find specialist historic environment professionals.
Government building safety remediation data releases
Show some progress, but a 50% gap not yet started.
Testing For A Safer Future; an initial industry response
A response to the Independent Review of the Construction Product Testing Regime.
Requirements for UK buildings in certain circumstances.
CLC guidance for dutyholders and accountable persons.
Types of contractor in the construction industry
A long list, but are any missing ?
The Housing (Cladding Remediation) (Scotland) Bill 2023
Unanimously approved to legislation on May 14, 2024.
Asset information requirements AIR
In detail, with links to further resources.
Where it's AT Building Safety podcasts from CIAT
Unravelling the Golden Thread and CIAT’s Principal Designer Register for non-HRBs and HRBs.
What happened to Hadrian's Wall?
Its former stones can be found in buildings near its route.
Strategic ventilation in modern building design
Download your free guide.
Four new types of prior approval for solar developments
Online Planning Portal application types from 5 September.
Comments
[edit] To make a comment about this article, or to suggest changes, click 'Add a comment' above. Separate your comments from any existing comments by inserting a horizontal line.