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The report outlines three potential delivery options for the large-scale refurbishment, ranging from a “do minimum” multi-phased approach lasting up to 40 years, to making significant improvements in an intensive single phase of perhaps six years.
The entire programme is costed at between £3.5bn and £4.7bn. However, it also suggests that the return on investment in BIM reduces as the schedule for delivery extends.
Potential scope of works
Written by financial consultant Deolitte, architect HOK and Aecom, the document suggests that the overall approach to design management will be influenced by the choice of delivery option and the client’s willingness to accept risk.
But it says: “A programme of this scale and complexity will require multiple designers, from a wide range of disciplines. In order to maximise the potential of large multi-disciplinary teams there needs to be a sound design framework that is flexible, transferable, available to all disciplines and assists co-ordination, communication and design delivery. BIM can provide this framework.”
Giving further details in a technical appendix to the report, the authors anticipate a full point cloud laser survey of the Palace of Westminster, but acknowledge that this might not prove fully accurate, especially in plant rooms that have have become highly congested.
The report outlines various options in terms of timing, but acknowledges that “a significant risk with the E1 approach [over 24-40 years] would be the danger of software obsolesence”.
Meanwhile, it suggests that BIM would bring the greatest advantage under Option 3, the full move-out option estimated to take six years. The report says the Palace of Westminster could be built as a single 3D model, which would benefit the design, and modelling the whole building in one go would be more accurate than attempting to piece bits of the model together.
The BIM model could then be beneficially used for asset management at the end of the programme.
It also anticipates technical advances in BIM during the lifetime of the programme. “It is expected that … BIM will develop considerably, and the use of BIM will standard. Therefore the level of BIM that is achieved may evolve as the programme progresses.”
The report also cites the example of the restoration of parliament buildings in Ottowa, Canada, where hundreds of laser scans of the exterior and interior formed the “backbone” of a BIM model.
It also says that BIM can be used to improve project communication with the public, with an example being the restoration of the Pantheon Dome in Paris.
The authors also put forward the notion of Integrated Project Delivery, as a means of curtailing costs on the project, defining it as “an approach to delivering projects that integrates people, systems, business structures, and practices into a process that collaboratively uses the skills of all participants to optimise programme results”.
IPD suggests a fully collaborative, risk-sharing approach, often with a bespoke contract. The report suggests that “relationships between the major parties in construction programmes using traditional delivery approaches have grown increasingly adversarial and antagonistic to the effect of being counterproductive for all”.
“The IPD approach recognises this and offers benefits of early sharing of information and insight to a range of stakeholders, including early contractor involvement and key decision makers. This should lead to an increase in workflow efficiency and a reduction in cost.”
Read the full technical report here.
