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A prototype for activity modelling in CAD-programs for building design

A prototype for activity modelling in CAD-programs for building design. Anders Ekholm, LTH Consultants: Stefan Larsson and Bengt Larsson, Lasercad AB Balàzs Piri and László Hatvani, Cadprojekt. From drafting-oriented to object-oriented CAD.

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A prototype for activity modelling in CAD-programs for building design

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  1. A prototype for activity modelling in CAD-programs for building design Anders Ekholm, LTH Consultants: Stefan Larsson and Bengt Larsson, Lasercad AB Balàzs Piri and László Hatvani, Cadprojekt

  2. From drafting-oriented to object-oriented CAD • A prerequisite for computer integrated construction and facility management, CIC/FM, processes • CAD has mainly been used in the later stages of building design • Both activity and building are in focus in early stages • Today’s CAD programs do not support activity information management • Externally generated development may overlook ”tacit” knowledge • Ongoing research: EDM, SEED, BAS•CAAD etc.

  3. Today’s CAD-tools • A toolbox with a selection of objects: wall, slab, window, etc. • The tool creates a geometry object, e.g. a vertical plate, that may represent walls and barriers.

  4. Today’s CAD-tools Additional attributes can be edited through a dialogue window • Attributes, e.g. material, thickness, height, placement och centreline • Presentation, e.g. colour, material, layer

  5. Problem solving cycle • Architectural programming including activity description is part of the design process • Design of activities and building are mutually dependent

  6. The objectives of this project • Development of a program prototype for modelling user activities in the context of CAD for building design • The prototype shall act as a ”testbench” for usefulness analyses • Hopefully, the prototype will generate new ideas

  7. Information about activities in building design Activity information Activity areas/Aktiviteter Personnel support/Stödverksamhet Activity relationship information Communications/Kommunikation Material flow/Materialflöde Activity relationships/Relationer Resource and result information Product and material data/Produkt- och resursinformation Routings or manufacturing sequence data/ Processinformation Person information Personnel data/Personalinformation Equipment information Furniture, machinery and equipment data/ Möbler, maskiner och utrustning Building information Building (and process) support/ Byggnader och processanläggningar Hales, L.H. 1984 Computer Aided Facilities Planning

  8. Conceptual schema for the prototype program ”Activity Add-on”

  9. Activity design includes the definition of the spatial properties of the activity, e.g. by using a geometry tool in the CAD program

  10. The hatched area is defined as an activity through a command. Relation to other activities, duration etc., can be determined in a dialogue box

  11. This example of school layout design shows a floorplan and the activity tree for Groupwork in class A. Time settings show that it starts every monday at 12.45

  12. Activity modelling in CAD programs for building design • Development possibilities • Activity description: basis for acquisition of premises, existing or new • Space function programming • Visualisation of activities in buildings • Spatial layout design methods: relation matrices, area- and volume studies, flow schemas • Analyses of versatility of building spaces: further development of the Dutch SAR-methods • Activity libraries: Pattern language renewal • Process modelling

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