This paper presents a formal model for the management of data for collaborative design that supports the requirements in each design discipline and provides a framework to integrate the individual designs to describe the overall project. A version model is proposed to manage design data in a given discipline, where a version specifies the state of a particular design in that discipline. The versioning scheme is hierarchical in structure and supports the independent evolution of multiple alternatives. In addition, this model proposes configurations as a mechanism to integrate designs from individual discipline. A configuration is defined as a set of component versions (one from each participating discipline) and an associated set of constraints. Finally, this paper discusses a model of versions to support configurations, and enumerates the preconditions on the operators related to version and configuration management.

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