A. van Randen
Produktmodelleren in de bouw.
Report 95.3.LT.4433, Transport Engineering and Logistics.
Designing and building a house is a very complex process in which many
participants are involved. The client, the architect, the contractor and the
subcontractors and the gouvemment with a set of building regulations. The
communication between the different participants is crucial for the
success of the proces. When participants agree on the format in wich the
information will be described it is possible to exchage information, to
centralize the information and to build a library. It will also be possible
to develop computer aided conformance checking.
The Stichting Bouw Research (SBR) published a report on the manners of
product modelling. It describes the ways to generate a product model for
each discipline in the proces in wich the information for that particular
discipline is kept. By using different viewmodels it is possible to look at
the information in different manners. The different applications, used
within the discipline, all have their demand for specific information which
can be deduced from the central product model. Optimising the logistic
process becomes much easier as we have access to all information needed.
To improve the communication between the different participants, work has
been done to create a product model above the different disciplines. In the
SBR research this is realized by using the overlap of information in the
lower models for the highest model. A different approach is the one used in
the Combine project where all the information conceming the building is kept
in a integrated data model. Every participant has acces to the data by using
different design toois.
To describe information in a model a structure is needed. The International
Organisation for Standardisation (ISO) has developed a STandard for the
Exchange of Product model data (STEP). In the RATAS projekt in Finland there
has been an experiment implementing this data structure. In this projekt the
building is described in different levels of detail: building, system,
subsystem, part and detail. In the Technical University of Delft research has
been done to describe product information in a generic way wich enables us to
use parts of the same information in different designs.
Before trying to optimize the communication it could also be useful to
investigate if the need for communication can decrease. By a better
separation of the different disciplines and by dividing the responsabilities
many of the dependencies between the disciplines will disappear. A practical
implementation of this concept is the Matura Nederland system in wich the
infill system is separated from the support system. By doing so the need for
communication between the two fieids is decreased enormously. In the Matura
concept the different disciplines involved in the infill system are combined
in one product; the total infill system of a house.
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