CONSTRUCTION PROCUREMENT
below (1-7) are used within the new Toolkit. The Construction Playbook (2021) goes further, and recommends that the use of MMC is driven by standardised componentry. Developed within the P22 and P23 framework, a further category of MMC ‘0’ is suggested as a precursor to the offsite and onsite MMC categories. This results in the following categories in the NHS Modern Methods of Construction Toolkit:
Category 0 – Briefing, scoping and design stage (standardisation): Use a standardised approach to the macro and micro building design; i.e. building grids, floor heights, rooms, and components etc. Category 0 is not part of the MHCLG framework, but is the enabler for successful MMC. Category 0 encompasses the development and adoption of construction ‘platforms’, with digital construction at its heart. Category 1 – 3D primary structural systems: A systemised approach based on volumetric construction, involving the production of three-dimensional units in controlled factory conditions prior to final installation.
Category 2 – 2D primary structural systems: A systemised approach using flat panel units used for basic floor, wall, and roof structures of varying materials that are produced in a factory environment and assembled at the final workface to
produce a three-dimensional structure. Category 3 – Non-systemised primary structural components: Use of pre- manufactured structures made of frame or mass-engineered timber, cold rolled or hot rolled, or pre-cast, concrete. Category 4 – Additive manufacturing (structural and non-structural): The site- based or final workface printing of parts of buildings through various materials based on digital design and manufacturing techniques.
Category 5 – Assemblies and sub- assemblies: A design of different pre- manufacturing approaches that includes a unitised non-structural walling system, roof finish cassettes, or assemblies. Non-load- bearing mini-volumetric units (pods) used for highly serviced and more repeatable areas (e.g. bathrooms). Category 6 – Material and product innovations: Includes traditional single building products manufactured in large formal pre-cut configurations, or with each jointing feature, to reduce the extent of site labour (e.g. prefabricated reinforcement elements).
Category 7 – Site process innovations: This category is intended to encompass approaches utilising innovative site-based construction techniques that harness site progress improvement falling outside the five main pre-manufacturing categories, 1-5, or materials in Category 6.
What is included in the Toolkit? The new Toolkit contains several elements to help collate non-commercial data for healthcare projects. It enables teams to confirm the project typology, the extent of new or refurbishment areas, and the stage of development. The Toolkit also includes the following key elements:
Benefits assessment The first section captures client priorities for the project based around the principles of faster, better, sustainable legacy and economic value, these being aligned to the values described within the New Hospital Programme and other healthcare programmes. Each of the principles is underpinned be a series of metrics that can be assessed by the client team, with a measure of importance placed on each metric, as a score out of 10 (see Table 1). At high level, this client’s benefits assessment provides insight into their prioritisation for the future development, which will inform the forthcoming MMC strategy and typologies. This assessment can be developed through a collaborative workshop or guided individual assessment, with the intention of informing future design and procurement activities, aligning these decisions to the client priorities. Though this assessment we can ask
questions such as ‘Does the project need, or would it benefit from, faster delivery?’
0. Briefing, scoping, and design stage (standardisation, including digital construction).
1. 3D volumetric lift cores.
2. 2D-panelised lightweight steelwork frame systems.
3. Component systems – steelwork frame.
4. Additive Manufacturing.
5. Offsite-formed building services systems.
6. Roll-out and mat reinforcement.
7. Robotics and on-site innovation.
Figure 3: An illustration of the MMC categories for standardised componentry as per The Construction Playbook. 32 Health Estate Journal June 2023
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