buildingSMART International has generated two more open sharable standards through its Standards Program. The development of these standards has followed a rigorous process and been endorsed by the International Standards Committee.
The purpose of the IFC4 Design Transfer View is to provide building information with support for editing of interconnected elements.
IFC4 Design Transfer View
Such applications enable inserting, deleting, moving, and modifying physical building elements and spaces. An example of a target scenario is an architect providing building design information to an engineer for a particular discipline, where geometric modifications may need to be made.
The main purpose of the IFC4 Reference View is to define a standardized subset of the IFC4 schema, a Model View Definition MVD, that is particularly suitable for all BIM work flows that are based on reference models where the exchange is mainly one-directional.
Over 160 people from 19 different nations gathered in London Watford for the buildingSMART International Standards Conference.
Key milestones achieved during the summit include:
The inaugural meeting of the Standards Committee (SC) took place
The Standards Process, launched in Toronto, was used throughout the summit
The Standards Committee Executive (SCE) agreed to put forward, S1004 IFC alignment 1.0 and S1001 Coordination MVDs for IFC4 (Design Transfer View) and S1002 (Reference View), for endorsement as bSI Final Standard
4 Initiation requests were received to create a bSI Standard Proposal
1 Development request to approve as bSI Candidate Standard
4 Deployment request to approve as bSI Final Standard
Room Charters continued to be developed ready for final issue in June
BuildingSMART International is delighted to announce that it has appointed Richard Kelly to the new full time role of Operations Director.
Richard comes from Heathrow Airport Ltd. where he has an asset management and process improvement leadership role. He will take up his new post on 9 March 2015. buildingSMART International made significant progress during 2014 in reorganizing its activities to provide the stronger leadership demanded of it around the world as the uptake of open BIM gathers pace.
The creation of a new post of Operations Director represents an important move to strengthen further the leadership capability of buildingSMART International. Richard will focus on the day to day operations of buildingSMART and on developing the Standards Program.
bSI Newsletter No. 17 is now available – Strategic changes to reshape bSI. bSI chair Patrick MacLeamy put the case for strategic change in his paper, The Way Forward. ‘BuildingSmart International is at a turning point…
The beta version of a minor IFC4 update, the IFC4 Addendum 1, has been published on 11. Aug 2014. The review period is now open until 30. Sep 2014.
London / Munich, Aug 11, 2014
As part of the ongoing maintenance work on its main standard specification, the Industry Foundation Classes (IFC) for BIM data sharing, buildingSMART International has published today the beta version of a minor enhancement of the IFC4 specification, the IFC4 Addendum 1.
The beta version is now out for public review until Sep 30, 2014. At the same time, the first official Model View Definition (MVD), based on IFC4 Addendum 1, has been published as well.
See the official website for all information, online access, downloads and guidelines on how to comment during the review period.
New model view definitions will speed uptake of IFC4
A project to create a model view definition for IFC4 launched on 1 January and is now half-way through its workplan. The development of this essential tool is being done by buildingSMART’s Model Support Group, led by Thomas Liebich, and work is expected to complete in August. The tool is key to unlocking the benefits of IFC4 and allowing end-users to achieve swift, open workflows.
‘The coordination view for IFC 2×3 was broadly acknowledged to have been very successful,’ says Thomas. ‘But now that we are moving on to a model view definition for IFC4, we have the opportunity to learn from past experiences.’
Why is the model coordination view needed? A model view definition (MVD) is a subset of the IFC standard. ‘Software solutions supporting IFC are always based on an MVD – a subset that meets the needs of one or more particular use cases,’ Thomas explains. ‘The coordination view is probably the most important tool for implementing IFC in commercial software products.’The main use case of the coordination view is to support the exchange of information between the separate models of the structural, architectural and building services disciplines. The architectural design mustn’t obstruct the structural elements and the building services mustn’t block either the structure or the architecture: for this reason, the clash detection support of IFC has long been valued. It is regularly cited as one of the greatest benefits of IFC. A number of other use cases are also covered in the MVD, including consistency control, building code checking, the coordination of voids and tighter integration of architectural, mechanical and structural design and detailing.
Swift and easier to use: the new coordination view. Coordination planning and clash detection represent one of the most important workflows today. The IFC 2×3 coordination view was widely implemented by software vendors who submitted their products for bS certification – and overall it commanded the confidence of the market. But end-users were in practice often frustrated because it did not distinguish between different workflows.
The many demands made of it meant that heavy computation was necessary and this in turn led to long loading times for import and export. For certain activities, the complex geometry inherent in the view, and the way it operated, made it cumbersome. It was providing a sledgehammer to crack a nut, or – as Thomas puts it – ‘it was shooting beyond the mark’. To resolve this problem, the Model Support Group decided to split the coordination view into two sub-views: the IFC4 reference view and the IFC design transfer or handover view. The goal of the reference view is to enable the swift, accurate exchange of information between disciplines for reference. As the definition of the project explains, the view must allow 100% correct explicit geometry and 100% correct attributes, properties and spatial structures, with rapid export and import times and no need for rework. The goal of the design transfer view – this is a working title – is to allow the BIM model to be handed over to the next stage of editing, which is likely to be a once-and-for-all adoption, with a modicum of rework and longer import/export times acceptable. Responsibility for the transferred model is likely to be taken over by the receiver. ‘While providing a generic solution, we are able to meet the separate needs of reference and transfer,’ says Thomas.
What next? The project, stage one of which is funded by the Norwegian National Office of Building Technology and Administration, is expected to complete in two phases in July and September. Software companies can then start to implement the view in their software products, with buildingSMART certification to IFC4 due to begin some time in 2015. ‘Results of our work will provide immediate benefits,’ concludes Thomas. ‘End users will be able to use open solutions for collaborative workflows, clients can require project information to be delivered in an open format and software vendors will be able give their customers design tools that work fast and efficiently.’
Newsletter for Open BIM. IFC4 coordination view project underway/BuildingSMART responds to market demand/PhD students learn about buildingSMART/Creating business value through BIM – International survey to explore the economic benefits/Next steps in certification/New bSI award for Heroes of Interoperability/CEN looking to develop BIM standards/What is open BIM?