1. Theoretical Fundamentals for Computer Supported Collaborative Design od Structures D. Hartmann / D. Bretschneider D. Hartmann and D. Bretschneider Department of Civil Engineering Institute for Computational Engineering Ruhr-University of Bochum Germany

2. Introduction Can structural design, including the anthropocentric aspects of collaborative work, be mapped to a software system ? D. Hartmann / D. Bretschneider

3. proof of practicability and serviceability through INDUSYS (INDUstrial SYStem) Fundamentals of INDUSYS Modeling of INDUSYS Application example D. Hartmann / D. Bretschneider

4. Fundamentals three basic features are most vital: (i) formalization and representation of the anthropocentric components of collaborative work (ii) computerized support for universally valid project management activities (iii) availability of a holistic and consistent product model of the structure to be designed complexity and dynamic nature require a generic, abstract reproducible and concise calculus of description ! accomplished through the object-oriented paradigm (OOP) utilizing the Unified Modeling Language (UML) D. Hartmann / D. Bretschneider

5. solution approach: transform structural design into object classes and class diagrams (i) a process model to represent team computing, independent of structural steel design (COOPERATE) create two separate subsystems, (ii) a structure-oriented product model (PLAKON) concatenate both subsystems to an integrated system (INDUSYS) validate and streamline the total system enhance the system incrementally D. Hartmann / D. Bretschneider

6. provides means of communication, coordination and cooperation Process model supports the following subcategories of cooperation: reciprocal teamworkparallel teamworksequential teamwork D. Hartmann / D. Bretschneider

7. derived process model and management tools (according to UML) D. Hartmann / D. Bretschneider

8. subdivided into the 4 cascading product submodels using OOM Product model (for structural steel design) D. Hartmann / D. Bretschneider

9. illustration of the cascade of product submodels D. Hartmann / D. Bretschneider preliminary design

10. illustration of the cascade of product submodels D. Hartmann / D. Bretschneider structural analysis

11. illustration of the cascade of product submodels D. Hartmann / D. Bretschneider verification

12. illustration of the cascade of product submodels D. Hartmann / D. Bretschneider structural detailing

13. Application example simplified design scenario: project manager P 1 stress analyst A 1 structural engineer S 1 draftsmen (CAD experts) D 1 D 2 Design of a water treatment plant D. Hartmann / D. Bretschneider

14. preliminary design: - P 1 defines the basics of the structure - P 1 + A 1 + S 1 determine load cases - product submodel of preliminary design process of collaboration - P 1 decides on the team members by means of Team Editor D. Hartmann / D. Bretschneider

15. structural analysis: - product submodel of structural analysis - S 1 computes structural response in terms of Stress-resultants D. Hartmann / D. Bretschneider

16. verification: - P 1 + S 1 are charged with the verification - product submodel of verification - P 1 decomposes total work and defines Task-objects using Project-Editor D. Hartmann / D. Bretschneider

17. structural detailing: - P 1 is charged with conflict resolutions - product submodel of structural detailing D. Hartmann / D. Bretschneider - P 1 + S 1 + A 1 + D 1 + D 2 are working together

18. LAN conflict resolution D. Hartmann / D. Bretschneider

19. Conclusions CSCW-systems provide the potential to create sophisticated structural design Computing opens further enhancements and improvements (e.g. multi-media inclusion) implementation of soft issues (social models) is becoming attractive in engineering new directions (e.g. multi-agent technology) and further research is required in the next years D. Hartmann / D. Bretschneider