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An Investigation Into The Impacts Of Change Orders On Labor Efficiency In The Mechanical Construction Industry
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Book Synopsis An Investigation Into the Impacts of Change Orders on Labor Efficiency in the Mechanical Construction Industry by : Timothy W. Gotzion
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:
Book Synopsis The Impact of Change Orders on Mechanical Construction Labor Efficiency by : Paul Joseph Vandenberg
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.
Book Synopsis An Investigation Into the Impacts of Change Orders on Labor Efficiency in the Electrical Construction Industry by : Matthew J. Bruggink
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:
Book Synopsis Quantitative and Qualitative Approaches to Determine Cumulative Impact of Change on Mechanical and Electrical Labor Productivity by : Joel Phillip Dettwiler
Download or read book Quantitative and Qualitative Approaches to Determine Cumulative Impact of Change on Mechanical and Electrical Labor Productivity written by Joel Phillip Dettwiler and published by . This book was released on 1999 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using System Dynamics to Study the Effect of Change Orders on Labor Productivity by : Shrouk Gharib
Download or read book Using System Dynamics to Study the Effect of Change Orders on Labor Productivity written by Shrouk Gharib and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Change orders in construction projects lead to numerous negative impacts, including loss of labor productivity, delays, and cost overruns. Owners and contractors are usually in disagreement when it comes to allocating the extent of responsibilities with respect to the resulting overruns. Each party tries to hold the other party fully responsible for such overruns through a series of claims and disputes. Several delay analysis techniques have been developed to aid in settling such disputes, however, they do not fully grasp the rippled impacts of change orders and do not assist parties in reaching consensus when it comes to finding the isolated rippled impacts of each change order. This research aims to develop a framework that supports delay analysis based on dynamic modeling with a focus on the impacts of change orders. System dynamics is utilized as the base modeling methodology due to its capability of capturing rippled impacts and complex interrelations. A novel calibration methodology is also developed to enable using this framework in any construction project. After development and verification, the framework was tested on a sample construction project that faced delays due to change orders. The developed model was able to quantitatively link the productivity losses and delays to each change order, which helped in clearly allocating the responsible parties for the delays. In addition, several what-if-scenarios were conducted to enhance the understanding of how such impacts could have been avoided. This research is envisaged to support owners and contractors in quickly reaching consensus regarding the impacts of change orders; thus, minimizing the corresponding disputes and fostering a healthier contracting environment.
Book Synopsis Quantification of the Cumulative Impact of Change Orders on Sheet Metal Labor Productivity by : Kenneth Timothy Sullivan
Download or read book Quantification of the Cumulative Impact of Change Orders on Sheet Metal Labor Productivity written by Kenneth Timothy Sullivan and published by . This book was released on 2004 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Impact of Change Orders on Electrical Construction Labor Efficiency by : David John Thomack
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:
Book Synopsis Quantitative and Qualitative Approaches to Determine Cumulative Impact of Change on Mechanical and Electrical Labor Productivity by : Pehr Anthony Peterson
Download or read book Quantitative and Qualitative Approaches to Determine Cumulative Impact of Change on Mechanical and Electrical Labor Productivity written by Pehr Anthony Peterson and published by . This book was released on 1999 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantification of Factors Affecting Labor Productivity for Electrical and Mechanical Construction by : Kenneth Timothy Sullivan
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:
Book Synopsis Construction Change Orders by : James Jerome O'Brien
Download or read book Construction Change Orders written by James Jerome O'Brien and published by McGraw Hill Professional. This book was released on 1998 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an award-winning author, this valuable reference includes a complete example of a typical change order, and covers the entire subject thoroughly from the contractual basis for change orders, to legal considerations, impact on the schedule, cost of time, documentation, subcontractors, potential impacts of change orders, and more. 80 illus.
Book Synopsis Managing Construction Cost an Investigation Into the Underlying Factors which Contribute to the High Incidence of Change Orders in the Construction Industry by : Samuel Nathaniel Trotman
Download or read book Managing Construction Cost an Investigation Into the Underlying Factors which Contribute to the High Incidence of Change Orders in the Construction Industry written by Samuel Nathaniel Trotman and published by . This book was released on 2001 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculating Construction Damages by : William Schwartzkopf
Download or read book Calculating Construction Damages written by William Schwartzkopf and published by Wolters Kluwer. This book was released on 2000-01-01 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculating construction damages can be complex and confusing. Written by recognized experts in the area of construction claims, Aspen Publishersand’ Calculating Construction Damages is a one-of-a-kind resource providing step-by-step guidelines for valuing a claim and calculating damages. Calculating Construction Damages keeps you completely up-to-date with the changes in the construction industry, and provides new and updated coverage on: Reductions in scope through deductive changes The meaning and explanation of acceleration The use of the actual cost method and the total cost method to calculate damages The effectiveness of expanding on productivity analysis. The definition of home office overhead costs and the use of the Eichleay formula. The most recent assessment of attorneysand’ fees on Miller Act claims Only Aspen Publishersand’ Calculating Construction Damages leads you through every step you need to take in order to reach an accurate assessment of construction damages. Complete coverage includes: General Principles of Damage Calculation Labor Costs Equipment and Small Tool Costs; Additional Equipment Costs Material Costs Bond and Insurance Costs Home Office Overhead Calculating Construction Damages is organized by type of damage rather than type of claim. Its clear, mathematical techniques will enable you to value any claim and accurately calculate damages.
Book Synopsis Change Order Impact Assessment for Labor Intensive Construction by : Murat Gunduz
Download or read book Change Order Impact Assessment for Labor Intensive Construction written by Murat Gunduz and published by . This book was released on 2002 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling Productivity Losses Due to Change Orders by : Ali Emamifar
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.
Book Synopsis Construction Delay Claims by : Barry B. Bramble
Download or read book Construction Delay Claims written by Barry B. Bramble and published by Aspen Publishers. This book was released on 2010-10 with total page 1030 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contracts can be your first line of defense against delays. But they have tobe drafted very carefully. Construction Delay Claims gives youan in-depth analysis of all the pertinent clauses and details what they canand can't do to minimize delays and avoid litigation.Construction Delay Claims, Fourth Edition, by Barry B. Brambleand Michael T. Callahan is written for everyone involved with delay and impactconstruction claims--the most common form of disputes in the constructionindustry. You'll find that this resource presents the most thorough, detailedreview of delay claims liability available, including a complete descriptionof the entire process for filing and pursuing claims along with more than1,950 cases and analyses.Construction Delay Claims gives you the information you need todetermine your best course of action. The book presents detailed knowledgedrawn from the authors' thirty-five years of experience in the industry.You'll learn how to anticipate delays and mitigate damages through the use ofadvanced planning and immediate responses by the parties involved. You'll alsoreceive helpful instructions about the best use of construction schedules toavert delays, or to prove their impact if they do occur.Construction Delay Claims keeps you completely up-to-date withthe changes in the construction industry, and the construction litigationprocess. Coverage includes:Effective ways to challenge a claimant's use of the Total Cost Method ofCalculationThe effectiveness of "no damages for delay" clausesThe use of ADR methods to resolve delay claimsThe meaning and implication of concurrent delaysCumulative impact effect of multiple change ordersThe impact and probability of delays in design-build, construction management,and multiple prime contractingLatest research into the effect and measurement of lost productivityThe most recent assessments of how states are applying the Eichleayformula
Book Synopsis Project Labor Agreements by : John Thomas Dunlop
Download or read book Project Labor Agreements written by John Thomas Dunlop and published by . This book was released on 2002 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Construction Project Management by : Eddy M. Rojas
Download or read book Construction Project Management written by Eddy M. Rojas and published by J. Ross Publishing. This book was released on 2009-06-15 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: Construction Project Management offers some of the best project management studies commissioned by ELECTRI International: The Foundation for Electrical Construction that were selected, coordinated, and monitored by some of the most progressive contractors and performed by outstanding scholars from top U.S. universities. Topics include pre-construction planning, early warning signs of project distress, impact of change orders, project sequencing, ideal jobsite inventory levels, tool and material control systems, recommended safety practices, partnering, total quality management, quality assurance, performance evaluations, and contract risk management. All specialty and general contractors will find value in this practical book. The concepts presented will improve your understanding of the main issues affecting construction project management and will provide you with tools and strategies to enhance your company's productivity and profitability.
