scholarly journals Comparison of DB to DBB on highway projects in Washington State, USA

2018 ◽  
Vol 8 (2) ◽  
pp. 73-86 ◽  
Author(s):  
George Okere ◽  
Keyword(s):  
Quantitative Methods ◽  
Washington State ◽  
The Body ◽  
Project Delivery ◽  
Delivery Methods ◽  
Highway Projects ◽  
Change Orders ◽  
Contract Duration ◽  
Comparative Results ◽  
Washington State Department

Comparative evaluations of design-build (DB), to design-bid-build (DBB), aredocumented in literature. However, a recent study suggests that even though several studies have been completed to compare DB and DBB, there are few statistically significant comparative results. Comparative analyses of highway projects of the same scope, size, and type could provide the basis to make the argument for the use of either DB or DBB on highway projects. The objective of this research is to compare DB to DBB on highway projects. The basis of comparison includes project cost, contract duration, number and type of contract change orders. Projects used for this research were obtained from the Washington State Department of Transportation (WSDOT). The projects were subsequently selected based on project scope,size, and type, and then analysed using quantitative methods. The research found that there is enough evidence to support the use of DB over DBB on highway projects. The findings of this study have significant implications for practitioners and policymakers on highway projects and should inform decisions on the choice of project delivery method. The main limitation of the research is that the study used only 14 projects due to the difficulty of finding matching projects,and as such the results could not be generalized. However, the findings add to the body of research on criteria for comparing DB to DBB. To enhance understanding of how project scope, size, and type might affect or be affected by project delivery methods,the research recommends the standardization of project types classification for highway projects

scholarly journals Scientometric analysis of BIM-based research in construction engineering and management

2019 ◽  
Vol 26 (8) ◽  
pp. 1750-1776 ◽  
Author(s):  
Ruoyu Jin ◽  
Yang Zou ◽  
Kassim Gidado ◽  
Phillip Ashton ◽  
Noel Painting
Keyword(s):  
Construction Industry ◽  
The Body ◽  
Information Modeling ◽  
Project Delivery ◽  
Scientometric Analysis ◽  
Delivery Methods ◽  
Research Directions ◽  
Content Type ◽  
Construction Engineering ◽  
Project Delivery Methods

Purpose The purpose of this paper is to summarize the latest research of BIM adoption in construction engineering and management (CEM) and propose research directions for future scholarly work. During the recent decade, building information modeling (BIM) has gained increasing applications and research interest in the construction industry. Although there have been review-based studies that summarized BIM-based research in the overall architecture, engineering and construction (AEC) area, there is limited review that evaluates the current stage of BIM-based research specifically in the CEM sub-area. Design/methodology/approach CEM falls into the scope of AEC. It involves construction-related tasks, activities and processes (e.g. scheduling and cost estimates), issues (e.g. constructability), as well as human factors (e.g. collaboration). This study adopted a holistic literature review approach that incorporates bibliometric search and scientometric analysis. A total of 276 articles related to BIM applied in CEM were selected from Scopus as the literature sample for the scientometric analysis. Findings Some key CEM research areas (e.g. CEM pedagogy, integrated project delivery, lean and off-site construction) were identified and evaluated. Research trends in these areas were identified, and analyses were carried out with regard to how they could be integrated with BIM. For example, BIM, as a data repository for ACE facilities, has substantial potential to be integrated with a variety of other digital technologies, project delivery methods and innovative construction techniques throughout the whole process of CEM. Practical implications As BIM is one of the key technologies and digital platforms to improve the construction productivity and collaboration, it is important for industry practitioners to be updated of the latest movement and progress of the academic research. The industry, academics and governmental authorities should work with joint effort to fill the gap by first recognizing the current needs, limitations and trends of applying BIM in the construction industry. For example, it needs more understanding about how to address technical interoperability issues and how to introduce the integrated design and construction delivery approach for BIM implementation under the UK BIM Level 2/3 framework. Originality/value This study contributed to the body of knowledge in BIM by proposing a framework leading to research directions including the differences of BIM effects between design-bid-build and other fast-track project delivery methods; the integration of BIM with off-site construction; and BIM pedagogy in CEM. It also addressed the need to investigate the similarities and differences between academia and industry toward perceiving the movement of BIM in construction field work.

ANALYSIS OF IMPEDIMENTS TO A SUCCESSFUL CONSTRUCTABILITY PROCESS IN HIGHWAY CONSTRUCTION

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
R. Edward Minchin ◽  
Reihaneh Samsami ◽  
Dan Tran ◽  
Dan D’Angelo ◽  
Sidney Scott ◽  
...  
Keyword(s):  
Construction Projects ◽  
Cost Savings ◽  
Project Delivery ◽  
Delivery Methods ◽  
Contract Duration ◽  
Federal Highway ◽  
Project Delivery Methods ◽  
The Us ◽  
Us Government ◽  
Permitting Process

The US Federal Highway Administration (FHWA) Every Day Counts Program (EDC) has resulted in state Departments of Transportation (DOTs) putting evermore emphasis on speeding up the delivery of highway and bridge construction projects for use by the driving public. This has resulted in an increase in the use of integrated project delivery methods and adding alternative technical concepts (ATCs) to traditional design-bid-build (DBB) contracts. ATCs have exhibited great potential for delivering substantial benefits like cost savings, increased constructability, and quicker project delivery. Previous research has found that knowledge of project constructability was lacking in state DOT planning, programming, and environmental staffs. At the same time, the permitting process for several government agencies has become increasingly restrictive. The intent of this paper is to report on the research team's progress in an ongoing effort to furnish the US government with a uniform set of guidelines for the application of the constructability process during all phases of project development and delivery. The research uses surveys, focus groups and interviews to determine which states have implemented formal programs to ensure that the constructor is furnished with a set of contract documents that affords said constructor with the best possible opportunity to successfully construct the project with the highest quality standards, within the contract duration and without exceeding the construction budget.

scholarly journals COLLABORATIVE PROJECT DELIVERY METHODS: A SCOPING REVIEW

2020 ◽  
Vol 26 (3) ◽  
pp. 278-303 ◽  
Author(s):  
Atle Engebø ◽  
Ola Lædre ◽  
Brendan Young ◽  
Per Fridtjof Larssen ◽  
Jardar Lohne ◽  
...  
Keyword(s):  
State Of The Art ◽  
The Body ◽  
Project Delivery ◽  
Social Dimensions ◽  
Delivery Methods ◽  
Collaborative Project ◽  
Current State ◽  
Complex Projects ◽  
Project Delivery Methods ◽  
Construction Operation

Understanding how to systemise, organise, and finance the design, construction, operation, and maintenance activities are all parameters needed to be optimised simultaneously in a Project Delivery Method. To meet the challenges of increasingly complex projects, a new class of delivery methods is emerging. These methods are often labelled “collaborative” since they seek to align the client’s interest with those of the supply chain. The purpose of this article is to present the current state-of-the-art through a review of 156 identified articles concerning Partnering, Integrated Project Delivery, Alliancing, Relational Contracting, and Relationship-Based Procurement. A framework for the methodological procedure based on the state of the art within qualitative research was elaborated and is reported on in this paper. The results show that there is a range of research on collaborative project delivery methods across the world. By analysing the study purposes, important themes generated and delineated as a) Conceptualisation, b) Implementation and experiences, c) Pros & Cons, d) Building Partnership & Social Dimensions, and e) Performance and Success. The paper provides an overview of collaborative project delivery methods identified in the realm of academic journals. Secondly, knowledge gaps have been identified by creating a summary of the body of evidence.

scholarly journals Critical Comparison of Progressive Design-Build and Construction Manager/General Contractor Project Delivery Methods

2019 ◽  
Vol 2673 (1) ◽  
pp. 261-268 ◽  
Author(s):  
Douglas D. Gransberg ◽  
Keith R. Molenaar
Keyword(s):  
Project Delivery ◽  
Federally Funded ◽  
Delivery Methods ◽  
Highway Projects ◽  
General Contractor ◽  
Traditional Design ◽  
Project Delivery Methods ◽  
Design Build ◽  
Permitting Process ◽  
Environmental Permitting

Progressive design-build (PDB) is an emerging variation of alternative contracting methods (ACMs) in the highway construction industry. It is widely used in water/wastewater and airport projects, but it is new to federally-funded highway projects. A few state department of transportations (DOTs) have begun to experiment with the method, using their experience with qualification-based selection (QBS) and a subsequent negotiated construction price from construction manager/general contractor (CMGC) contracting. There has been little written that provides guidance to public highway agencies who are interested in implementing PDB. Therefore, the purpose of this paper is to first describe the mechanics of PDB project delivery to provide consistent foundation information from which DOTs can inform their decision as to when to use it. The paper also provides a comparative analysis of PDB with CMGC and finds that they are nearly identical with regard to format, differing only in whether the owner retains the design responsibility in CMGC or assigns it to the design-builder in PDB. It also finds that PDB is more appropriate than traditional design-build (DB) for projects in which the owner needs to engage the design-builder in the preliminary engineering and environmental permitting process.

scholarly journals Evaluating Occupational Health and Safety Management Strategy Success Factors for Small-Scale Contractors in Zambia

2021 ◽  
Vol 13 (9) ◽  
pp. 4696
Author(s):  
Mwewa Mambwe ◽  
Erastus M. Mwanaumo ◽  
Wellington D. Thwala ◽  
Clinton O. Aigbavboa
Keyword(s):  
Occupational Health ◽  
Human Resource Development ◽  
Management Strategy ◽  
Quantitative Methods ◽  
Success Factors ◽  
Health And Safety ◽  
Occupational Health And Safety ◽  
Electricity Industry ◽  
The Body ◽  
Small Scale

Small-scale contractors (SSCs) require management strategies in implementing occupational health and safety (OH&S) performance at projects to reduce accidents, injuries, fatalities and diseases. Management strategy success factors have been acknowledged to be of great benefit in improving in OH&S performance. Hence, the study sought to assess the management strategy success factors for the improvement of OH&S performance by SSCs in Zambia’s electricity industry. Using quantitative methods, data was collected using a survey questionnaire from 246 respondents representing firm owners, managers, project managers and OH&S representatives at electricity industry projects at 70.3% response rate. Descriptive and inferential statistics were adopted as methods of data analysis using exploratory factor analysis. After analysis, the success factors were clustered into three construct categories within OH&S performance namely, compliance and workplace processes, policy and human resource development, and leadership and structure significant values ranging from 0.513 to 0.972. The independent reliability was tested using the Cronbach Alpha coefficient. The study exposed management strategy success factors are well recognised by most SSCs and contributed to the body of knowledge in this mastery by introducing three success factors for OH&S performance. It is recommended that these factors be adopted and considered to improve OH&S performance management by SSCs in the electricity industry in Zambia.

Using Large Linked Field Data Sets to Investigate Density’s Impact on the Performance of Washington State Department of Transportation Asphalt Pavements

2021 ◽  
pp. 036119812110061
Author(s):  
Ryan Howell ◽  
Stephen Muench ◽  
Milad Zokaei Ashtiani ◽  
James Feracor ◽  
Mark Russell ◽  
...  
Keyword(s):  
Aggregate Size ◽  
Large Data ◽  
State Department ◽  
Washington State ◽  
Maximum Aggregate Size ◽  
Test Case ◽  
Data Sets ◽  
Department Of Transportation ◽  
Clear Trend ◽  
Washington State Department

Large data sets of Washington State Department of Transportation (WSDOT) pavement construction and condition data are linked together and used to investigate an implemented change in in-place density to lower specification limit (LSL) from 91% to 92%. This serves as a test case for using such large in-service data sets to create analysis value for a state DOT. Findings include: (1) WSDOT field density has remained relatively steady at 93% for over 20 years; (2) raising the density LSL to 92% will likely result in more contractor effort to achieve higher densities; (3) no clear trend links density with better pavement condition; (4) raising the density LSL will likely result in fewer problematically low densities; and (5) there is no evidence of differing pavement performance based on asphalt content, gradation, or nominal maximum aggregate size.

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