CONSTRUCTION & BIM
This effect consists of increased revenue through BIM, in terms of an increase in the value of the building, as well as cost savings in the planning, construction and operating phases. Around 47% of the improvement in project EBIT of TÜV SÜD’s construction project was attributable to savings in the planning and construction phase and, 40% from the operating phase.
When examining the question of where the use of BIM has the greatest impact in terms of costs reduction, the following six key drivers were identified during this analysis: Space optimisation; reduction of maintenance work preparation; reduction of operational running costs; BIM-based thermal building simulation; avoidance of profit loss due to timely completion; and, BIM-based system simulation.
Taking into account the investments to be carried by the parties involved, the analysis of the example project shows that the building owner is the main beneficiary. Although they also have to bear a large share of the investment costs, they benefit in return from almost two thirds of the effects achieved. Also, FM companies benefit to a relatively large extent, since numerous savings in the operating phase are related to an increase in the efficiency of external service processes.
Other drivers, that play a role in improving revenues or reducing costs, were also identified. These included the reduction of the volume of additional work through clash detection and control; optimal construction process planning and budget monitoring with real-time control; the optimisation of construction site logistics; BIM-based cost management; and the reduction of material waste through need-based purchasing.
state-of-the-art construction projects, analysed the return on investment (ROI) for BIM. Completed in 2018, the planning phase for the building took about two years, while the construction phase required another two.
Typically, when distributing the lifecycle costs of a building, it is widely assumed that the operating costs account for about 80% of total building costs. TÜV SÜD’s example revealed this not always to be the case, as the majority of the costs (about 65%) were attributable to the design or construction phase and the smaller share (about 35%) to the operating phase.
With the use of BIM, this effect is intensified and the costs of operating the building only accounted for a share of about 31% of the total costs. This shift is because higher initial investments, such as more energy-efficient technical building or construction concepts, mean that costs are higher at the beginning. Even though the savings in the planning phase are relatively small, an investment in BIM will pay for itself in the short term due to the high savings in construction costs.
However, a considerable cost reduction is achieved in the operating phase and an analysis of this sample project showed that a 67-fold ROI can be achieved with an investment in BIM.
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Apart from the drivers that have a direct financial impact, BIM has various effects that cannot be measured quantitatively. Examples include the positive effects on the environment, health and safety, and the reputation of the parties involved. For example, BIM supports sustainability goals as they can be taken into account from the very beginning of planning.
However, it is important to note that these key benefits can only be achieved when the BIM methodology is implemented correctly, as the quality of BIM throughout a project’s entire lifecycle plays an essential role in maximising these benefits. In projects where BIM has not been implemented correctly, we have seen costs increasing by approximately 10% to 30% over the initial design budget.
It is clear that BIM has the potential to increase efficiency and reduce construction costs during the planning, design and execution process, while also improving overall project quality and utility. It can prove particularly profitable for building owners, due to the high potentials. Building owners, investors and asset holders should therefore effectively adopt BIM as an essential standard to design, plan and operate assets over their entire lifecycle.
www.tuvsud.com/en-gb/buildings TOMORROW’S FM | 61
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