HUMAN EFFECTS IN EARLY-STAGE CONSTRUCTION CONTRACT PRICE FORECASTING

This paper describes a postal survey of UK quantity surveyors to relat e human factors, such as experience and personality, to conceptual est imating expertise. Composite variables were derived by factor analysis and examined against estimates of average national prices for several types of building. It is shown that expertise is very much of a proje ct specific nature and does not extend in a simplistic way to projects outside the defined domain and that estimators must exercise of great caution when undertaking work even slightly outside their regular act ivities. Different building types demand different emphasis and specia l attention is drawn to the complexity of the project, the degree of s ervices content, and particular sub-market conditions. The easiest pro jects to estimate appear to be industrial (factories) and residential (houses) with offices being the hardest, probably due to the wider var iety of design and quality options in the latter. Knowledge and care a re identified as the most crucial attributes of good estimators. A few myths are also dispelled. Geographical location, for instance, was fo und not to be a major issue. Similarly, there was no evidence of any ' 'X'' factor whereby individuals can claim any mystical inborn talent. The indications are that good estimators have exactly the same attribu tes as good gamblers-they do their research selectively and thoroughly , think carefully, and concentrate on what they know best.