skip to content

Centre for Digital Built Britain


To evaluate the actual impact BIM deployment has on asset planning, delivery and operation, PwC were commissioned to develop a BIM Benefits Measurement Methodology (BMM). The BMM sets out a measurement rational and model, whilst the Application Report tests deployment of the BMM on projects that have used BIM in their delivery. As well as providing a methodology for measuring benefits, the BMM Benefits Framework is intended help to define potential BIM benefits from the project outset, following industry plan of work stages. The BMM and associated Report documents are available below.


The UK BIM Task Group formed in approximately May 2011 following the issue of the BIM Strategy.

The strategy kick started the formation of BIM Level 2 with drafting of the PAS 1192 suite of standards and the deployment of departmental BIM support to bring six key departments (Highways England, Environment Agency, Ministry of Justice, Defence Infrastructure Organisation, Department of Health and Education Skills Funding Agency) to a level of awareness and readiness for BIM by April 2016.

This was achieved with all departments having identified BIM champions, working to deliver agreed organisational BIM strategies through compliant templates and processes.

Through benchmark reporting led by the Cabinet Office (now IPA), BIM supported the delivery of £3bn capital project delivery savings as stated in the CO Benchmarking Report dated March 2016 (Below.)

Departments are now working to implement BIM as business as usual. This requires a further degree of engagement within their supply chains, across all functions of their organisations and is requiring a different model of peer support and knowledge share from the current UK BIM Programme. It is essential the new Centre for Digital Built Britain Programme maintains a strong focus on BIM Level 2 sponsoring the development and updating of the key standards, to ensure the fundamental infrastructure of BIM Level 2 remains updated, coordinated and that key stakeholders continue to have a managed forum, in order for them to remain informed. The BIM Level 2 workstream also needs to support the IPA construction team in the delivery of the UK Government’s Construction Strategy and to support new construction efficiency initiatives.

The CDBB BIM Level 2 delivery team are working closely with IPA, mandated departments and wider public sector to ensure both IPA and CDBB goals are being progressed and met. The BIM Working group consists of circa 20 public sector major procurers, who come together to grow their knowledge, experiences and initiatives to support delivery the Government’s efficiency and modern methods of construction agenda.

BIM Level 2 - The Foundation of Future Digital Efficiency

The UK Construction Industry has, over the past circa 70 years, had approximately 35 different initiatives to increase its efficiency. Many have had a short-term effect, but have, over the medium term, lost impact and hence the industry has resumed the norm, in terms of attitudes and productivity. The UK construction industry is made up of circa 30,000 different companies with a further circa 30,000 product manufacturing companies and material suppliers. The industry is a patchwork of large organisations, SMEs and Micro enterprises. As BIM is essentially a change in the way projects are procured, designed, delivered, handed over and operated, it represents a significant programme of change. The BIM programme has had central Government as a champion over the past 6 years. This has made a significant difference to industry and client uptake. Key benefits have been delivered, with key benefits measurement methodology and case studies appended to this report. The CDBB programme and Government need to continue to champion the Level 2 programme in order to cement the foundations of digital delivery, are essential for future digital deployment across UK infrastructure planning, delivery and operations. 

Current Case Studies – Trends and Themes

Through the UK BIM Task Group and CDBB support, key documents have been produced to support the already in place BIM Level 2 wrapper (1192 specifications, contract protocols etc.)   Documents include the specification for a Asset Information Model Common Data Environment, BIM Benefits Measurement Methodology and key standard BIM templates. Work is ongoing to support a Products Data standard and UKAS accredited programmes. All are in support of progressing BIM Level 2 as business as usual and in support of current Government initiatives around Modern Methods of Construction (off-site, volumetric and componentised manufacture). In addition, outcomes of the recent Dame Judith Hackitt review, suggest BIM could be significant in ensuring increased certainty, quality and provenance in the assets delivered. Further, the data handed over could improve the operational management of the asset over the whole life cycle. Dame Judith’s findings came out of the tragic events of the Grenfell fire. 

The following appendices include an overview benefits statement from the key mandated departments and benefit case studies where BIM has been deployed in building and infrastructure projects.

Benefit Themes:

Deployment of BIM level 2 within departments and organisations act as a catalyst for improvement and change beyond the Level 2 core deliverables. Environment agency state efficiencies of circa £600k per annum in managed data transfer from capital projects to operations.

A number of the benefit statements state the targeted request of information supports the supply chain in focusing their data capture, thus reducing wasted effort and cost in capturing and sharing unwanted information. Clear client requirements also deliver on the Government Construction Strategy Intelligent Client performance capabilities.

Use of the models to co-ordinate design and reduce on site re-work. A Highways England case study appended, indicates a potential saving of circa £1m brought about by the coordination and pre- planning enabled by BIM.

The benefits of stakeholder engagement run through all the case studies and benefit statements. Producing 3D models and using them to enhance scheme development and linking to virtual reality enables stakeholders to better understand the potential asset and can therefore comment very early in the process reducing wasted design effort, cost and on-site rework. 

Increased co-ordination of operations supports reduced impact on the public and locality. Thus, reducing disruption of local businesses. A case study by TFL on the Old Street Upgrade is included.

Increased co-ordination supported by BIM enhances Health and Safety Planning. Keeping sites and the public safe is a prime requirement for all projects. TFL case study for Bond Street to Baker Street tube tunnel lining upgrade explains more on how BIM was used to reduce risk. Reducing risk and injury has a major impact on cost for a project and wider social care.

Working collaboratively is a key requirement for BIM delivery. A Common Data Environment is a central tenant of collaborative working and information sharing and design co-ordination. An Environment Agency case study on the impacts of a CDE is attached. In support of effective CDE procurement the CDBB BIM Level 2 team have published and issued a specification to support effective procurement of software systems.

The benefits of BIM are direct and indirect. In order to further evidence the direct impact of BIM on projects, a benefits model of measurement has been developed by PWC under the direction of the BIM Level 2 team. The benefits model overview note is attached in the appendices. The model is currently being tested with projects across the Environment Agency, Department of Health and Ministry of Justice.


BIM level 2 has helped deliver significant benefits including monitory, safety, planning, reputational and many more. It has the potential to deliver increased benefits in operations beyond current outcomes, support SME providers through standardisation (manufacturing for instance through the Product Data Standard) through the delivery of standard libraries (supporting the modern methods of construction agenda and further in the Transforming Infrastructure Efficiency programme) and creating the platform to grow digital take up across future Digital Built Britain initiatives. BIM Level 2 is here and delivering benefits now. It has been successful because it has been championed form the highest level. It needs to be further driven and sponsored to get to a point of business as usual. Lessons learnt from the past are that, if the central drive for change moves before business as usual has been met, industry goes back to the traditional norm. The UK estates and construction sector is very complex and change across such a diverse industry takes time.