Excerpt from the article on the specialist platform elektro.net:
... The presentation by Peter Kaiser, Technical Delegate in the ZVEH, also dealt with planning according to BIM. He himself runs a planning office and reported on his experiences with BIM - which he described as "planning in 5D": In addition to the three spatial dimensions, deadlines and costs are added, which are already defined in the planning phase.
A major advantage of BIM: the different trades plan on the basis of the same database. Possible collisions, for example between the cable route and the ventilation duct, can thus already be recognised and remedied during the planning phase. To ensure this, however, the approach must change: With BIM, there is no longer any planning during construction, but the planning phase must be completed before construction begins.
Peter Kaiser still sees a problem for trades businesses in the fact that various issues surrounding BIM have not been conclusively solved, such as the question of what exactly the business actually has to deliver in a tender that requires BIM. For example, with BIM there are different levels of detail from 100 (geometry only) to 500 - if this is not clearly defined in advance, it could well lead to legal disputes...
You can read the entire report here.