Exploring BIM in Design Coordination Along With Integrated Project Delivery

Using IPD in Estimating Cost Certainty

Within the AIA project phases, design coordination in construction plays a pivotal role in effectively managing project budgets. The emphasis remains continuous, focusing on monitoring both cost overruns and cost reductions. This method ensures that the estimated project cost is seldom exceeded, owing to the meticulously coordinated steps across the various AIA project phases. The initial estimated cost is determined through a synthesis of insights, deliberations, and the collective experience of the professional team members. Additionally, the ongoing monitoring and evaluation processes within the AIA project phases further diminish the likelihood of costs exceeding the originally projected budget.

Within the IPD delivery method, project stakeholders and participants willingly invest in a project, understanding its inherent financial risks. They are keen to avoid cost overruns that could impact their profits negatively. Consequently, the integrated project delivery method considers this potential scenario and incorporates "managing risk situations" as an integral part of its planning. This planning of dealing with the risk situation greatly helps with greater cost certainty (Deutsch, 2011). IPD with BIM integrated the following principles for budgeting to reduce cost errors in a project:

• Effective and improvised administration of the construction project by eliminating any difficulty or communication problem between the owner and the planner, designer and the contractor’s teams
• Taking steps to complete the project within the given budget by optimising construction and procurement strategies after carefully considering different teams' project requirements and risk assumptions.
• Reducing the chances of the increased or overrun budget through effective management. This is possible due to increased communications, precise construction, and budgetary planning through IPD.
• Educating architects on the project's cost-effectiveness through access to the construction and current prices. This information is provided to them in the initial stages of design making. A different tool, such as BIM, is highly influential in this regard.
• Estimating costs of each developmental phase in the beginning.
• Taking steps to ensure there is no legal claim of additional budget or compensation in future (Kent & Becerik-Gerber, 2010).

• Cost Estimation

The basic elements in the cost estimation process are the pricing and quantity take-off. These quantities can be obtained in a cost database by being integrated into the building information model. However, this model does not help in getting pricing. To estimate the cost of a project, a cost estimator expert is required to estimate and analyse the cost of every material used in that project and how it should be installed. The pricing of each step is available in the database; however, if it is missing for a degree, then it is the responsibility of the cost estimator that he should study more deeply and come out with an accurate pricing solution (Azhar et al., 2009).

For example, if there is an activity of pouring concrete, then the budget for everything, such as wire mesh, concrete rebar, etc., and the quantity to be used should be defined by BIM. This model will counter every detail of everything involved in the activity. The cost estimator should evaluate each unit price, material cost, labour cost and even estimated profits; the labour units will involve the mobilisation, their working duration wages and material cost, including the sum of all the materials used. Once the unit prices are obtained, the entire project's cost is estimated by multiplying the total quantity extracted from the BIM. The data input and output are quite good in the BIM approach. For the successful implication of BIM, the architect and the constructor must agree on basic component definitions. There would be only successful results (Gudnason & Scherer, 2012).

Strength and Limitation of IPD in Reducing Risks

Integrated Project Delivery (IPD) is an emerging innovation in construction delivery. It usually conceives the owner, the architect or engineer and the contractor, all entering into a single contract and operating as a collaborative team to design and develop the project with shared risks and rewards in the final cost, schedule, and quality of the larger project. As stated, IPD is like a joint venture strategy for design and construction. It reflects a radical deviation from conventional delivery methods that isolate responsibilities, liabilities, communication, risks, and rewards with contracts that often lack an impetus to collaborate and work toward the shared objective of a successful overall project.

IPD is a growing delivery strategy based on broad concepts that can be tailored project-by-project. While there is no concrete description of IPD, the following basic concepts are generally present:

• One Integrated Agreement

The main team members, including the owner, architect, engineer, and contractor, enter into a single contract. Either contracting method for IPD manifests a considerably different contractual design from Design Bid Build, in which the owner enters into separate contracts with the architect/engineer and the general contractor, who are accountable solely to the owner.

• Shared Risk and Reward

The main IPD team members manage and share risks and rewards in the project's results, generally its cost and completion time. However, performance indicators can be established, including quality, sustainability, minority hiring, etc.

One method with IPD is to split the compensation of each core team member into three categories: direct cost, overhead and profit, and bonus.

• Collaboration

Rather than each party having its own on-site office, IPD projects involve a so-called ‘big room’ in which all parties are stationed together to exchange ideas, collaborate and function as a team. The IPD contract must stipulate how BIM or other technology will be used, specifically in input, access, alterations, confidentiality, copyright ownership, technological capability, dependability on data provided by others and restricted or complete responsibility for errors.

• Joint Decision-Making

To make decisions regarding the project, all stakeholders may require approval, votes may be weighted, veto power may be vested in certain team members, or the owner may reserve the privilege to decide when the team members cannot arrive at a consensus.

• Dispute and Liability Avoidance

A hallmark of IPD is minimising the risk of disputes, liability, and litigation to promote cooperation and a team environment. The project team members may agree upon different methods to appropriately limit liability: they may excuse each other from liability for good faith errors in judgment, even if negligence is found, except, of course, to the extent that deliberate misconduct prevails.

Advantages of Integrated Project Delivery

An objective of the design coordination process, which is to potentially benefit all participants in the design and construction of a project, is Integrated Project Delivery (IPD). Some of its specific possible advantages are stated below:

• Cost savings for the owner (possibly the costs of construction, operations, and maintenance) result from the incentive for the team members to earn bonuses.
• Rapid project conclusion for the owner, again due to the incentive for the team members to earn bonuses.
• Bonuses are given out to the designers and contractors for accomplishing cost savings and faster completion of the project, as other project objectives.
• Minimized risk of design and construction defects as a result of the collaborative teamwork strategy
• Minimized liability for the designers and contractors as a result of the acknowledged limitations of liability and dispute aversion

Disadvantages of Integrated Project Delivery

IPD is not meant for everyone and may not live up to its maximum advantage. Some of its shortcomings are stated below:

• Highly expert designers or contractors may not be familiar with IPD and be reluctant to take part in an IPD project
• Getting all prominent IPD team members to agree on one party agreement could prove impossible or frustrating.
• An owner may face challenges obtaining financing because lenders are not familiar with IPD or may not like its strategy for various reasons, such as the potential for bonuses to be paid because of the limitations of liability.
• Limiting liability implies that the party suffering economic damages or other detrimental consequences would be left ‘holding the bag’ (the insurance industry is reviewing possible products to insure against such risks to facilitate IPD.
• The bonus incentive system requires carefully checking budgets and schedules to ensure they are fair, appropriate, and not excessive.
• Solid leadership and management must endorse teamwork to ensure active, enthusiastic, positive participation and avert lax participation – IPD is not meant for laid-back or slack workers.

Conclusion

IPD is designed solely on collaboration, which is, in turn, based on trust. As teams are structured, the entire focus is on project outcome instead of the traditional approach in which individual goal is focused. The best thing is the presence of mutual trust and respect towards the team members, which requires involvement by every party. Compensation is awarded to the teams which have obtained project goals by utilising innovative business models through collaboration and efficiency.

The traditional project delivery method is based on fragments assembled just as needed. Then again, they are strongly hierarchical and controlled entirely by higher management—the processes are linear, distinct and segregated into sub-tasks according to teams’ knowledge and expertise. The risk factor involved in such projects is high at the individual level, which is then transferred to the greatest extent possible. Further, this process promotes innovation and a culture of exceptional high-class performance. During this construction phase, the project is ascertained through intensified planning, which increases efficiency and savings. As responsibilities are clearly defined, problems are identified and resolved immediately without individual liability. The complete team is responsible for errors; hence, disputes are resolved promptly.

IPD is possibly the most enthralling innovation in the design and construction industry in decades. With the possibility of considerable cost savings and efficiencies rarely witnessed under conventional delivery methods, and with the lure of camaraderie and a collaborative, teamwork environment, IPD could become the leading delivery method in the industry.