FEBRUARY - 2021CONSTRUCTIONTECHREVIEW.COM9Going from 3D to 4D is the first step to 5D WoW. A 4D simulation of a construction schedule, a `Digital rehearsal,' allows contractors and sub-contractors, planners and designers to work together to facilitate the build of a project and deliver to the agreed program. Fixing problems at the design stage is much easier, and of course cheaper, than struggling with design problems once construction is underway. We are starting to introduce simulations of construction from the concept stage, a `Digital rehearsal' of the project. We link project plans and designs so that we can regularly check that the design can­and will­be built within the time and can make well-informed design action throughout as and when appropriate. With a 4D simulation, we can also more accurately assess the logistics of difficult sites. Can we get the materials in and out quickly, safely and efficiently? Where do we locate the cranes for maximum utilization? How do we minimize disruption to neighbors, traffic, businesses?The addition of `Cost' to the 4D model allows you to assess the cost impact implications of design decisions, options rapidly time delays and off-site construction options with greater financial understanding and ultimately less risk.To make 5D BIM work successfully throughout the duration of a project does, however, require substantial changes to ways of working, not just within a discipline, but across the whole supply-chain and project team. 5DWow is in the early stages of adoption, as very few companies in the construction industry systematically capture cost data. Even fewer are willing to share such valuable information. Nevertheless, there are major advantages to accelerating the costing process and using the best available data to make better-informed decisions. We are finding that clients, engineers and designers are starting to acknowledge and appreciate the benefits of this more transparent, efficient, and more viable way of working. Aside from identifying partners and suppliers with the appropriate digital tools, it is also about finding those with a complementary mindset; companies who thrive within and push the boundaries of the digital environment. A collaborative approach is also essential as information must be shared.If we can to work together, using actual data, we will be able to learn from real experience and deliver better projects more efficiently; the client will be truly in control. Tools for designing in 3D (or more), capturing data, sharing through cloud-based Common Data Environments, and digital toolkits for planning, simulation and cost estimation have all been around for yearsTony Gosling
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