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Project team members in design–build system, including ownerÕs representatives, design–build (D/B) contractors and architects/ engineers, have to adopt new roles in managing the design of large-scale projects. The design responsibility is transferred from the ownerÕs organization to the D/B contractor who is responsible for the design management in the projects to be delivered by the design–build procurement system. However, there remains the concern of design management between the designer and the con-structor within the D/B organization, or between the joint venture parties of a D/B project. This paper presents a study, which reviews the issues concerning the design liability and contractual provisions for design management between the designer and D/ B contractor in the said contractual arrangements of design–build system. It disseminates the results of a questionnaire survey and structured interviews of three groups of project participants: owners, designers and D/B contractors. The roles and responsibilities of the parties involved in design and design management are less than clear in their respective engagement contracts. In order to improve the design management of design–build projects, this paper recommended some strategic items to be considered in drafting contracts between owners/D/B contractors, D/B contractors/designers and owners/independent checkers to address the issues.
For design-build (DB) projects, owners normally use lump sum and guaranteed maximum price (GMP) as the major contract payment provisions. However, there was a lack of empirical studies to compare the project performance within different contract types and investigate how different project characteristics affect the owners' selection of contract arrangement. Project information from the Design-Build Institute of America database was collected to reveal the statistical relationship between different project characteristics and contract types and to compare project performance between lump sum and GMP contract. The results show that lump sum is still the most frequently used contract method for DB projects, especially in the public sector. However, projects using GMP contract are more likely to have less schedule delay and cost overrun as compared to those with lump-sum contracts. The chi-square tests of cross tabulations reveal that project type, owner type, and procurement method affect the selection of contract types significantly. Civil infrastructure rather than industrial engineering project tends to use lump sum more frequently, and the qualification-oriented contractor selection process resorts to GMP more often compared with the cost-oriented process. The findings of this research contribute to the current body of knowledge concerning the effect of associated project characteristics on contract type selection. Overall, the results of this study provide empirical evidence from real DB projects that can be used by owners to select appropriate contract types and eventually improve future project performance.
IABSE symposium report, 19th IABSE Congress2016 : Challenges in design and construction of an innovative & sustainable built environment
DESIGN BUILD CONTRACTS: KEY TO COST EFFICIENCY2016 •
Fast track construction, aesthetics, sustainability and economy are the prerequisites of the built environment. Realization of aesthetical yet economical structures through fast track construction is a creative process. This necessarily warrants: Project based design approach Value engineering at every stage Complementing the design with the resources of contractors Constructability to suit fast track nature We want to leave behind our built environment to our posterity which should match with what our predecessors have left us with incredible, Mandirs, Masjids and Mahals. To achieve this, it is argued in this paper that the 'Design and Build' organizations have to be encouraged as they can have undivided vision of overall objective. They are well equipped with the components of Construction Techno-Management (CTM) viz: Design, Technology and Construction management. It is debated in the paper that the organizations that do not possess the time tested technical department, a separate construction system department and plant engineering capabilities will not be able to evaluate and price the technical intricacies and nuances when the conception and design is carried out by a separate agency. It is very imperative that the organization structure vis-à-vis in house technical support in terms of Design, Technology and Management is given paramount importance during pre-qualification stage. It is often the case that the contractor and consultant position themselves on the opposite side of the divide leading to over runs, arising out of non-appreciation of contractor's available resources and expertise during conception and design stage by the external consultants. Thus, to facilitate value engineered, fast tracked, aesthetically pleasant, sustainable and economically built environment, 'Design and Build' contracts with adequate stress on aesthetics appear to be having advantages over traditional contracting. In the paper above nuances are discussed in detail.]
The 4th International Congress on Contemporary Architecture and Urbanism
Analysis of the Use and Application of Design-Build Contracts and Build- Operate-Transfer Contracts in Construction Sector2021 •
The acquisitions of infrastructure projects using public-private-partnership methods require the public and private sectors adopt new skills, roles, responsibilities and risks, and thus effectively manage all stages of a project's life cycle. Design-Build (DB) and Build-Operate-Transfer (BOT) contracts are the two types of public-private-partnerships that are widely used in the region that are aimed in this study. In order to analyze and compare DB and BOT projects, this study collected data, by means of convenient random sampling, from construction projects built by ministries of Republic of Turkey. Statistical tests were conducted to determine if the metrics related to cost and schedule. The findings of this study will help the public agencies decide what delivery method is best for their projects in terms of controlling costs and schedule. Results show that DB projects outperform BOT projects in terms of cost and schedule.
Proceedings Article
The Study of the Use and Application of Design-Build Contracts and Build-Operate-Transfer Contracts in Construction Sector of Turkey2021 •
Design-Build (DB) and Build-Operate-Transfer (BOT) contracts are the two types of public-private-partnerships that are widely used in the region that are aimed in this study. The objectives of this study were to analyze and compare DB and BOT projects in terms of project costs and durations. In order to analyze and compare Design-Build (DB) and Build-Operate-Transfer (BOT) projects, this study collected data by means of convenient random sampling, from construction projects built by five ministries of Republic of Turkey. Statistical tests were conducted to determine if the metrics related to cost and schedule were significantly different from each other in these two types of projects. The findings of this study will help the public agencies decide what delivery method is best for their projects in terms of controlling costs and schedule. Results show that DB projects outperform BOT projects in terms of cost and schedule. The results of this research will enable governments to become...
2015 •
Over the recent years the UK construction industry has seen an increasing level of interest in the use of design and build (D&B) as a construction procurement method. This appears to be mainly driven by an attempt by the industry to increase the level of integration in what is generally viewed as a fragmented industry. The main advantages associated with this procurement method that have been cited in reviewed literature have been numerous. Key advantages appear to be the following: single point responsibility for the whole project delivery encompassing design and construction, early contractor involvement resulting in potential cost savings and earlier completion, easy constructability and minimisation of design and construction risk to clients. Despite its perceived increase in adoption over the last decade as supported by the relatively recent Contracts in use survey in 2010 by the RICS, the construction industry is still experiencing problems associated with D&B procurement. Thi...
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law
Design Development Post Contract Signing - Client or Contractors Cost?2019 •
Archives of Civil Engineering
Design and Build Procurement System – Contractor Selection2012 •
One of the contract awarding systems in public sector in Poland is the Design & Build system. In this system, a client concludes a contract agreement with only one company, a contractor, in order to carry out both design and construction of works. While deciding on this form of delivery of a public project, the client is obliged to conduct a single proceeding aiming to select the contractor. In this paper, public works contracts awarded in the D&B system in Poland are analysed, whilst attention was put on the contracting modes and assessment criteria. The results are assessed against the experience of other countries and recommended methods for selection of the Design and Build contractor.
La Chimica nella Scuola
La legge della conservazione delle masse di Lavoisier2010 •
Journal of Geography in Higher Education
Teaching geopolitics through sport2024 •
American Journal of Physical Anthropology
Health status among prehistoric Eskimos from Point Hope, Alaska2011 •
Physical Review C
Dynamics of the quasielasticO16(e,e′p)reaction atQ2≈0.8(GeV∕c)22004 •
Rezeption des Alten Orients, eds. Kerstin Droß-Krüpe, Robert Rollinger, and Kai Ruffing (Der Neue Pauly Supplemente), Heidelberg: J.B Metzler
Judentum2025 •
Ecology and Society
Markets Drive the Specialization Strategies of Forest Peoples2004 •
Journal of clinical oncology : official journal of the American Society of Clinical Oncology
Adoptive T-Cell Therapy Is a Promising Salvage Approach for Advanced or Recurrent Metastatic Cervical Cancer2015 •
SSR Institute of International Journal of Life Sciences
Bacteriological Study of Flora Harboured by Mobile Phones of Health Care Personnel at Tertiary Care Hospital, AurangabadMateriały i Sprawozdania Rzeszowskiego Ośrodka Archeologicznego t.44
The Mysterious Copper Battle Axe from the Castle Museum in Sandomierz2023 •
Journal of Neuropathology & Experimental Neurology
Clinical Importance of Molecular Testing in Neuromuscular Choristomas