Simultaneous multi-user computer aided design (CAD) allows multiple designers to contribute to the same model at the same time. The resulting parallel design workflow shortens product development cycles. In a replicated, simultaneous multi-user CAD system, modeling data must be kept consistent between clients. This paper presents a method that keeps independent copies of the models in sync between distributed CAD clients. This is accomplished by enforcing modeling operations to occur in the same order on all the clients. In case of conflict, a resolution method preserves conflicting operations locally for later reuse or resolution by the user. These methods are implemented in a commercial CAD system which has been enhanced to enable simultaneous multi-user. Validation tests are run to demonstrate that the methods implemented ensure model consistency and resolve conflicts while preserving conflicting operation data.
Model Consistency and Conflict Resolution With Data Preservation in Multi-User Computer Aided Design
Contributed by the Design Engineering Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING. Manuscript received October 08, 2013; final manuscript received January 17, 2014; published online March 12, 2014. Assoc. Editor: Joshua D. Summers.
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Hepworth, A., Tew, K., Trent, M., Ricks, D., Jensen, C. G., and Red, W. E. (March 12, 2014). "Model Consistency and Conflict Resolution With Data Preservation in Multi-User Computer Aided Design." ASME. J. Comput. Inf. Sci. Eng. June 2014; 14(2): 021008. https://doi.org/10.1115/1.4026553
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