A Unified Conflict Prevention Framework for Feature-Based 3D Collaborative Designing Environment

Feature-based collaborative designing environment has provided designers with a platform where products are developed in a parallel way. Conflicts among concurrent operations can never be ignored. Other than detecting and resolving conflicts after they occurred and caused inconsistencies, in this paper, a unified conflict prevention framework considering do, undo, redo operations is presented. By defining the reading and writing actions imposed on a part model, 6 operation transactions are identified. Potential conflicts are detected by monitoring the states of concurrent operation transactions and estimating possible topological entity change. A partial and total operation transaction rollback based confliction prevention method is proposed to preserve the design intentions of multiple users and maintain the data consistency of system. The proposed methods are tested in a prototype system with several case studies.