QUT ePrints

Estimating processes of smaller builders

Skitmore, Martin & Wilcock, John (1994) Estimating processes of smaller builders. Construction Management and Economics, 12(2), pp. 139-154.

Abstract

The paper describes a study of the way smaller builders price bills of quantities items for competitive tender. A series of interviews revealed some marked differences between normal practise and literature-based prescriptions. An experiment was conducted in which eight practising builders' estimators were separately presented with a representative sample of 36 bill of quantities items taken from groundwork, in-situ concrete work and masonry sections. The estimators stated the method they would normally use to price each item, their 'normal' price rate and their highest/lowest price rate. The results showed that only half the items would be priced by the prescribed 'detailed' method, the remainder being priced mainly by 'experience'. Analysis by work section, item rate, item quantity, item total, item labour content, contribution to the total of the bill, the standard deviation of the inter-estimator intra-item rates and totals, and their coefficients of variation, skewness and kurtosis indicated that the item total was the main factor determining the rating method used, although this varied in importance between work sections. An intra-estimator intra-item analysis of pricing variability generally confirmed the assumption of a constant coefficient of variation.

Impact and interest:

Citation countsare sourced monthly from Scopus and Web of Science® citation databases.

These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.

Citations counts from the Google Scholar™ indexing service can be viewed at the linked Google Scholar™ search.

Full-text downloads:

8,311 since deposited on 09 Jun 2006
4,354 in the past twelve months

Full-text downloadsdisplays the total number of times this work’s files (e.g., a PDF) have been downloaded from QUT ePrints as well as the number of downloads in the previous 365 days. The count includes downloads for all files if a work has more than one.

ID Code: 4438
Item Type: Journal Article
Additional URLs:
Keywords: Pricing, bills of quantities, item rates, variability
ISSN: 1466-433X
Subjects: Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > BUILDING (120200) > Quantity Surveying (120203)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 1994 Taylor & Francis
Copyright Statement: First published in Construction Management and Economics 12(2):pp. 139-154.
Deposited On: 09 Jun 2006
Last Modified: 09 Jun 2010 22:32

Export: EndNote | Dublin Core | BibTeX

Repository Staff Only: item control page