Last edited 11 Apr 2024

BIM dimensions, maturity and levels of development


[edit] What is building information modelling?

Building Information Modelling (BIM) is a very broad term that describes the process for specifying, creating, and managing digital information about a built asset such as a building, bridge, highway or tunnel.

Fundamentally, the purpose of BIM is to ensure that appropriate information is created in a suitable format at the right time so that better decisions can be made throughout the design, construction and operation of built assets. It is not about creating a 3D model on its own or an add-on to the model, it is a fundamentally different way of running a project from the early stages through to occupation, maximising digital capabilities. The amount of data associated with the model is referred to as the dimension or sometimes level when referring to complexity or capabilities.

[edit] How is building information modelling defined?

ISO 19650:2019 defines BIM as the: 'Use of a shared digital representation of a built asset to facilitate design, constructionand operation processes to form a reliable basis for decisions.'

Transforming Infrastructure Performance: Roadmap to 2030, Published by the Infrastructure and Projects Authority 13 September 2021, defines BIM as: ‘…a combination of process, standards and technology through which it is possible to generate, visualise, exchange, assure and subsequently use and re-use information, including data, to form a trustworthy foundation for decision-making to the benefit of all those involved in any part of an asset’s lifecycle. This includes inception, capital phase procurement and delivery, asset and facility management, maintenance, refurbishment, and ultimately an asset’s disposal or re-use.’

[edit] BIM dimensions, BIM levels of development and BIM maturity levels

BIM dimensions refers to the level of information that is stored alongside or integrated within the modelling environment. In general these accepted BIM dimensions include: 3D, 4D, 5D, 6D, 7D, there are also potentially 8D, 9D, 10D and 11D, though these are not generally formalised or standardised and as such recognized as known dimensions.

BIM levels of development (LOD) refers to the degree of accuracy, intricacy or granularity of the model or design. In general these LODs include LOD 100, LOD 200, LOD 300, LOD 400 and LOD 500.

BIM maturity levels refers to the extent to which project partners are collaborating with BIM. In general these matirity levels run from BIM level 1 through to BIM level 6.

Whilst all three terms used to decribe the capabilities and capacities of a BIM model describe slightly different aspects, they do also crossover in terms of their meaning, in as much as 8D BIM describes similar capabilities as LOD500 as there is a greater level of detail, and the greater the level of detail the more likely it is that collaboration will be higher in maturity.

[edit] BIM dimensions 2D-7D

[edit] Unoffical BIM dimensions 8D onward

[edit] BIM levels of development (BIM LOD)

BIM LOD was first introduced by the American Institute of Architects (AIA) in 2008, it defined five levels of development to describe the level of detailing appropriate for early to later stages of a project. In the UK a similar approach might be considered as relating the BIM model to the stages of the RIBA plan of work. Fore further information visit the page overlays to the RIBA plan of work, in particular the BIM overlay.

[edit] BIM maturity levels

[edit] Related articles on Designing Buildings

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