I am working on cost contingency in Construction Project. Any suggestion in relation to BIM adoption and cost risk management will be appreciated
Contingencies are unforeseen circumstances. One might be tempted to assume it is impossible to predict all events that are likely to occur simply by probing a design model. However, by carefully considering the simulation of alternative construction processes, risk events could be better understood and be prepared for.
Definitely BIM will reduce these cost by providing more clarification about the project which will increase all stakeholders understanding.
Regards
BIM will enable the interaction of designers, architects, engineers and construction personnel to visualize the model of the finished product or building thereby increasing cost estimate accuracy of material, man hours and project schedule. BIM will also reduce building services installations and building envelope or partitions.
In theory yes. In practice it depends. Do not forget the human capacity for abstraction, the BIM is a slower and more cumbersome approach. The benefits: BIM is good at tedious repetitive tasks that humans don't like. The BIM is a formal process, the frameworks encourages a complete plan, without BIM it is easy to skip something or forget to change all aspects of scope, schedule, and cost. Last, the BIM is a record, you can go back to the BIM and review the record. Also, be certain to define what type of construction. There is heavy construction, building construction, and industrial plants. The BIM is something different to each of these.
See
• Kelly, D.J. and Ilozor, B.D. (2013). A pilot causal comparative study of project performance metrics: Examining building information modeling (BIM) and integrated project delivery (IPD). The Built & Human Environment Review, 6, pp. 82-106.
• Ilozor, B.D. and Kelly, D.J. (2012) Building Information Modeling and Integrated Project Delivery in the Commercial Construction Industry: A Conceptual Study. Journal of Engineering, Project, and Production Management, 2(1), pp. 23-36.
BIM has a tremendous ability to reduce contingencies depending on what type of contingency you are referring to. Often an owner will put a contingency in his capital budget for changes he plans to make but hasn't had time to identify in detail, yet needs to get a budget approved. BIM can't help much there.
BIM has it's largest potential in the design and construction phase. A contingency in those two phases is often understood to be an amount of money set aside to cover unforeseen costs of designing and building a capital project. In the engineering world, because owners are pressing firms to reduce their fees, much of the design work is done by engineers that have limited construction experience because they are cheaper but may not be aware that what they have designed doesn't work in the real world. For example, a water pipe might be routed through a beam but because the piping drawings are on different pages than the structural drawings and it would be difficult to pick up the conflict if elevations were missing from the 2D drawings. Contractors that build from those designs often are aware of the errors and will add contingencies to their bids based upon previous experience with the errors in drawings. Because BIM involves 3D modeling, it forces the engineers to design in 3D and many engineering software packages include design element clash detection features. I have know many major contractors that pay third parties to convert 2D drawings into 3D models, just so they can identify the conflicts early on so they can address them at the beginning of the job rather than discover them during construction and suffer the ensuing delay when workers are standing around waiting for the solution. Good BIM designs greatly reduce the unseen errors prevalent in the 2D paradigm.
See
• Kelly, D.J. and Ilozor, B.D. (2013). A pilot causal comparative study of project performance metrics: Examining building information modeling (BIM) and integrated project delivery (IPD). The Built & Human Environment Review, 6, pp. 82-106.
• Ilozor, B.D. and Kelly, D.J. (2012) Building Information Modeling and Integrated Project Delivery in the Commercial Construction Industry: A Conceptual Study. Journal of Engineering, Project, and Production Management, 2(1), pp. 23-36.
Projects that utilized BIM in construction experienced significantly higher levels of both cost and schedule growth - regardless of the statistic employed. Cost growth for projects utilizing BIM in construction averaged 5.78%, while cost growth for projects that did not use BIM averaged 1.00%. Similarly, schedule growth for projects utilizing BIM in construction averaged 13.30%, while schedule growth for projects that did not utilize BIM averaged 6.31%. There are possible explanations for these outcomes.
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