based on a shared project procurement supported by equal gain & pain sharing among stakeholders. Information management is open and transparent with substantial knowledge-transfer across all stakeholders Integrated Project Delivery (IPD) needs a multiparty agreement between design and construction team. The purpose of this contract is to optimize project results and increase value to the owner by reducing waste and maximizing the efficiency in all phases of design, fabrication and construction. In IPD, all of the partners are committed to a pre- determined system which can be BIM. The owner should assemble the prime players into a contracted team at early inception and feasibility stages according to the presumed need of knowledge and expertise. The entire team members have the same objectives and continue their collaboration until project handover time. This results in reduction of documentation time and improvement of cost control and budget management. However, there is a challenge about how to manage the team and have the full benefit from all of the participants. Trust is an essential factor in this method since IPD engages many participants in a collaborative agreement. Also, all costs ideally should be fully open- book in nature and all incentive and goal achievement compensation are agreed to by the team and incorporated in the contracts in advance. Overall, obtaining an optimal collaborative process needs a transparent process, value-based decision making, shared risk and reward, open information sharing, and utilization of full technological capabilities and support. Accordingly, the design-build, IPD and other forms of collaborative delivery methods enable better opportunities for the client to benefit from BIM adoption particularly because all prime players are involved from the earliest practical moment, the design mostly is performed in-house (Eastman et al., 2008) and entire project team is equally (or similarly) incentivised to achieve the same set of goals (CMAA, 2012). However, it is
still needed to find alternative BIM based approaches to deliver a facility that creates a win-win situation for all stakeholders (Becerik-Gerber & Rice, 2010) and addresses all found challenges in existing methods. The AIA defines IPD as “a project delivery approach that integrates people, systems, business structures, and practices into a process that collaboratively harness the talents and insights of all project participants to optimize project results, increase value to the owner, reduce waste, and maximize efficiency through all phases of design, fabrication and construction” (AIA CA Council 2007) According to McAdam, 2010, the construction industry generally perceives collaborative procurement methods such as alliancing, partnering, design-build and integrated project delivery methods as conducive to BIM successful adoption.
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