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A platform for research: civil engineering, architecture and urbanism
The impact of change orders on mechanical construction labour efficiency
Change orders impact many areas of a construction project. However, the impacts that change orders have on labour efficiency are much harder to quantify than other impacts and therefore are a significant risk to contractors. Little research has been completed in the past quantifying these impacts, so disputes are common between owners and contractors regarding the actual cost of change. This study used data from 43 projects to develop a linear regression model that predicts the impact of change orders on labour efficiency. The input factors needed for the model are (1) total actual project hours, (2) total estimated change hours, (3) impact classification, and (4) timing of change. The model calculates the labour loss in efficiency for a particular project so that owners and contractors will better understand the true impact of change on labour efficiency. The research is limited to the mechanical trade, but does include specific work in plumbing, HVAC, process piping, and fire protection.
The impact of change orders on mechanical construction labour efficiency
Change orders impact many areas of a construction project. However, the impacts that change orders have on labour efficiency are much harder to quantify than other impacts and therefore are a significant risk to contractors. Little research has been completed in the past quantifying these impacts, so disputes are common between owners and contractors regarding the actual cost of change. This study used data from 43 projects to develop a linear regression model that predicts the impact of change orders on labour efficiency. The input factors needed for the model are (1) total actual project hours, (2) total estimated change hours, (3) impact classification, and (4) timing of change. The model calculates the labour loss in efficiency for a particular project so that owners and contractors will better understand the true impact of change on labour efficiency. The research is limited to the mechanical trade, but does include specific work in plumbing, HVAC, process piping, and fire protection.
The impact of change orders on mechanical construction labour efficiency
Hanna, Awad S. (author) / Russell, Jeffrey S. (author) / Vandenberg, Paul J. (author)
Construction Management and Economics ; 17 ; 721-730
1999-11-01
10 pages
Article (Journal)
Electronic Resource
English
The impact of change orders on mechanical construction labour efficiency
| British Library Online Contents | 1999
ARTICLES - The impact of change orders on mechanical construction labour efficiency
| Online Contents | 1999
Impact of Change Orders on Labor Efficiency for Mechanical Construction
| British Library Online Contents | 1999
TECHNICAL PAPERS - Impact of Change Orders on Labor Efficiency for Mechanical Construction
| Online Contents | 1999
TECHNICAL PAPERS - Impact of Change Orders on Labor Efficiency for Mechanical Construction
| Online Contents | 1999