Breaking Down Design-Bid-Build: The Traditional Construction Approach With The Help Of BIM.
Design-Bid-Build (DBB) is a traditional construction project delivery method that is widely used in the construction industry. It is a linear and sequential process where the #design, #bidding, and construction phases are separate and distinct. In DBB, the owner contracts with an #architect or #engineer to design the project, and then the design is put out for bid to contractors. The lowest bidder is then awarded the contract to build the project.
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The traditional design of DBB typically starts with a program where the owner wants to build a project depending on his needs for instance a hotel, residential building, or an educational institution in a school district with some creative ideas in mind, an estimated budget and this develops/evolves in several #iterations over the time. In DBB, in practice, there are seven phases of a typical project wiz., #programming, #schematic design, design development, construction documents, #bidding & #negotiation, construction, and #occupancy.
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The owner in the DBB environment hires an architect who will go on to prepare schematic designs and construction documents using 欧特克 REVIT, a major player in the #BIM world. A contractor bids on the project based on CDs in a competitive way along with his (selected) sub-contractors, and suppliers. In a project which adopts BIM and a complex project the owner contracts with the main agents such as designers, builders, and the company responsible for the BIM modeling (a Design Services company) this contract is based on IPD.?
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An Architect/designer starts with collecting abstract information - asking the client about the program or intended use of the proposed building this gathered data is then used in preparing a conceptual design that will lead to precise construction documents, with proper project management and construction administration the project succeeds and culminates into the occupation. The American Institute of Architects (AIA) #AIA is set up to help and guide the project in an orderly manner from start to finish so that there is little rework required.?#Submittals, #shopdrawings, and #asbuilts are reviewed and approved at each phase and division though there is a linear path from project inception to completion. The reality of the project is always circular and investigative. However, due to late critical design changes, the few phases can suffer time extensions, overlapping with each other.
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While DBB has been a popular delivery method for many years, it has its limitations. One of the main disadvantages is that the construction contractor is not involved in the design phase, which can lead to conflicts and misunderstandings during the construction phase due to poor management of the information flow in the AEC industry. The competitive bidding process can sometimes result in low-quality work or unexpected cost overruns.
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Despite these limitations, DBB remains a popular delivery method for many construction projects. It is particularly well-suited for simple, straightforward projects where the design requirements are well-understood and there is a competitive market for construction services. DBB can also provide the owner with a greater degree of control over the project and can help ensure that the project is completed on time and within budget.
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Also, proper handling of things and overcoming mismanagement of the flow of information by adopting BIM in Design-Bid-Build is a much-needed effort in the right direction. BIM allows an integrated flow and successful project delivery through the use of virtual models. There is a wide range of BIM applications in the construction industry wiz., including constructability analysis, design verification, analysis of the material's lifecycle used in a project, material take-off, cost estimation, simulations for environmental analysis and simulations, etc.
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BIM might lack systematic discussion about the management of BIM models for production. Research has to be taken up on the design and construction interface to explore the influence of procurement routes, and stakeholders' responsibilities which can guarantee a lean workflow.
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For a smooth flow, there are certain demands from
Architects -