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Author : Chul-Ki Chang
Publisher :
ISBN 13 :
Total Pages : 202 pages
Book Rating : 4.:/5 (89 download)
Download or read book Quantifying the Impact of Schedule Compression on Construction Labor Productivity written by Chul-Ki Chang and published by . This book was released on 2004 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Seulkee Lee
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (827 download)
Download or read book Understanding and Quantifying the Impact of Changes on Construction Labor Productivity written by Seulkee Lee and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (31 download)
Download or read book Measuring Productivity in the Construction Industry written by and published by . This book was released on 1973 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul Joseph Vandenberg
Publisher :
ISBN 13 :
Total Pages : 236 pages
Book Rating : 4.:/5 (89 download)
Download or read book The Impact of Change Orders on Mechanical Construction Labor Efficiency written by Paul Joseph Vandenberg and published by . This book was released on 1996 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Change orders impact many areas of construction projects. However, the impacts that change orders have on labor efficiency are much harder to quantify and are, therefore, a significant risk to contractors. Little research has been completed in the past quantifying these impacts so that disputes are common between owners and contractors regarding the actual cost of change. This study uses data from 43 projects, 27 impacted by changes and 16 not impacted by changes, to develop a linear regression model that predicts the impact on labor 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. Timing of Change is calculated by breaking the project schedule down into six periods (i.e., changes before construction start, 0 - 20%, 20 - 40%, 40 - 60%A, 60 - 80%, and 80 - 100%), listing the percentage of change that occurred in each period, and calculating a weighted timing factor. The model calculates the labor loss or gain in efficiency for a particular project so that owners and contractors will better understand the true change impact on labor efficiency. Significant results have been found in hypothesis testing. The results show that impacted projects have larger amounts of change, have a larger decrease in labor efficiency, and are more impacted by change that occurs later in the project schedule. These results appear to be consistent with the intuitive judgement of industry professionals. The research is limited to the mechanical trade, but does include specific work in plumbing, HVAC, process piping, and fire protection.
Author : David Alan Noyce
Publisher :
ISBN 13 :
Total Pages : 388 pages
Book Rating : 4.:/5 (89 download)
Download or read book The Impacts of Planned and Unplanned Schedule Compression Or Acceleration on the Labor Productivity of Contractors written by David Alan Noyce and published by . This book was released on 1995 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 804 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William Wallace Collins
Publisher :
ISBN 13 :
Total Pages : 354 pages
Book Rating : 4.:/5 (552 download)
Download or read book Methodology for Measuring the Effect of Management on Construction Labor Productivity written by William Wallace Collins and published by . This book was released on 1977 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : David John Thomack
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (89 download)
Download or read book The Impact of Change Orders on Electrical Construction Labor Efficiency written by David John Thomack and published by . This book was released on 1996 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Matthew J. Bruggink
Publisher :
ISBN 13 :
Total Pages : 352 pages
Book Rating : 4.:/5 (89 download)
Download or read book An Investigation Into the Impacts of Change Orders on Labor Efficiency in the Electrical Construction Industry written by Matthew J. Bruggink and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kenneth Timothy Sullivan
Publisher :
ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (89 download)
Download or read book Quantification of Factors Affecting Labor Productivity for Electrical and Mechanical Construction written by Kenneth Timothy Sullivan and published by . This book was released on 2002 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Timothy W. Gotzion
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.:/5 (89 download)
Download or read book An Investigation Into the Impacts of Change Orders on Labor Efficiency in the Mechanical Construction Industry written by Timothy W. Gotzion and published by . This book was released on 1998 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ted Trauner
Publisher : John Wiley & Sons
ISBN 13 : 1119910803
Total Pages : 229 pages
Book Rating : 4.1/5 (199 download)
Download or read book Productivity in Construction Projects written by Ted Trauner and published by John Wiley & Sons. This book was released on 2022-11-01 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: PRODUCTIVITY IN CONSTRUCTION PROJECTS From planning/design to post-construction, this valuable guide provides the construction industry the key to understanding the importance of properly tracking and measuring productivity, resulting in increased efficiency and profitability for contractors, subcontractors, owners, civil and construction engineers, and attorneys. Productivity in Construction Projects anticipates and answers the questions of owners, contractors, sub-contractors, and construction professionals to avoid cost overruns in a specific area of work, or when activities are taking more resources to perform than planned. Packed with real-world case studies, Productivity in Construction Projects’ thirteen chapters move beyond the symptoms and provide a remedy. This book provides a comprehensive look at how to: Complete more projects on time and budget, and earn greater profits and future business. Track and analyze productivity on construction projects, and quantify additional costs resulting from productivity losses. Select the right experts and attorneys should litigation or arbitration occur, and employ credible and reliable methods of analysis. Solve problems on the project instead of incurring lengthy and costly litigation or arbitration.
Author : Chukwuma Nnaji
Publisher :
ISBN 13 :
Total Pages : 454 pages
Book Rating : 4.:/5 (911 download)
Download or read book Framework for Measuring Construction Project Performance Using Energy written by Chukwuma Nnaji and published by . This book was released on 2015 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, the performance of construction projects has been a main source of concern given the percentage of a project cost associated with poor project performance. As a result of the growing clamor to improve the output of the built industry, comprehensive studies have been conducted to examine the factors that affect construction productivity, cost, schedule, safety and quality. However, little has been done to quantify the cumulative effect of project characteristics on the construction workforce. This study adopts the physical property of energy as a means to understand and quantify impacts to worker performance. To conduct the study, energy and its derivatives (power and pressure) were first translated from their physical sense to the context of work operations on a construction site. Once defined for construction operations, the research included conducting a survey of construction workers across 3 construction projects in the Pacific Northwest to quantify the workforce's perspective of construction energy and how work-related energy components impact construction workers. Specifically, the survey measured the impact of 55 components that were identified through an extensive literature search as possible constituents of energy. Craft workers, foremen, superintendents, project engineers, project managers, safety professionals, and owner representatives provided detailed insight into the energy components affecting their safety and quality of their daily output. The survey was followed by a severity analysis to determine the key components that play a major role in determining construction project performance. Analysis of the feedback from participants shows that while each work level rated the components differently, attitude of worker to safety and the use of poor quality materials were rated as the most impactful factors to safety and quality of work on a project level, respectively. Using these components, a project management framework for forecasting and evaluating safety and quality performance on a construction project utilizing energy principles as its foundation was developed and proposed. The framework may be used to plan the construction operations for optimal safety and quality.
Author : William Schwartzkopf
Publisher :
ISBN 13 : 9780735555075
Total Pages : 282 pages
Book Rating : 4.5/5 (55 download)
Download or read book Calculating Lost Labor Productivity in Construction Claims written by William Schwartzkopf and published by . This book was released on 2004-01-01 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable guide shows you how to accurately calculate lost labor productivity -- systematically -- so that you can quickly remove legal disputes. Leading authority William Schwartzkopf, an engineer and attorney, takes you step-by-step from working definitions of lost labor productivity to detailed discussions of the factors leading to lost productivity to proven measurement and calculation methods, including analysis formulas.
Author : William Schwartzkopf
Publisher : Wolters Kluwer Law & Business
ISBN 13 : 9780735510050
Total Pages : 282 pages
Book Rating : 4.5/5 (1 download)
Download or read book Calculating Lost Labor Productivity in Construction Costs, Cumulative Supplement written by William Schwartzkopf and published by Wolters Kluwer Law & Business. This book was released on 2011-10-13 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : S. P. Dozzi
Publisher :
ISBN 13 : 9780662211341
Total Pages : 44 pages
Book Rating : 4.2/5 (113 download)
Download or read book Productivity in Construction written by S. P. Dozzi and published by . This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ali Emamifar
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (129 download)
Download or read book Modeling Productivity Losses Due to Change Orders written by Ali Emamifar and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Change orders are an integral part of construction projects regardless of project size or complexity. Changes may cause interruption to the unchanged scope of work and working conditions and, if poorly managed, may be detrimental to project success. Many studies have been carried out to quantify the impact of change orders on construction labour productivity, with varying degrees of accuracy and variables considered. These studies reveal that quantifying loss of productivity due to change orders is not an easy task and requires a comprehensive and holistic method. There are several methods for quantifying loss of productivity, such as measured mile analysis (MMA) and the total cost method (TCM). Although measured mile analysis (MMA) is a well-known and widely accepted method for quantifying the cumulative impact of change orders on labour productivity, it is not readily applicable to many cases. In this research two models were developed to quantify losses arising from change orders. The first model does not account for the timing of change orders, but the second model considers the timing of change orders on labour productivity. Two models were developed and tested utilizing artificial neural networks and two sets of data collected by others in that field. The two datasets were statistically analyzed and preprocessed in order to transfer the data to normal distribution form and eliminate insignificant variables considered in their development. Using best subset regression, a total of seventeen variables were reduced to nine variables accordingly. Also, the study datasets were categorized into three types of timing periods; early change, normal change and late change to create the timing model. This was implemented to enable a comparison with models developed by others. Three types of artificial neural network techniques were experimented with and evaluated for possible use in the developed models. These three types are Feed Forward Neural Network, Cascade Neural Network, and Generalized Regression Neural Network. Candidate techniques were evaluated and analyzed by neural network parameters and analysis of variance (ANOVA) to select the most efficient type of neural networks, and subsequently using it to develop two models; one considers timing and the second does not. The analysis performed led to the selection of the cascade neural network for the development of the two models productivity losses due to change orders. The developed models were tested and validated utilizing several actual cases reported by others. The models were applied to a number of cases and the results were compared to those generated by frequently cited models to demonstrate their accuracy. The comparison outcome showed that the developed models can generate more accurate and satisfactory results than those of reported in previous studies.
