Research on Access Control in Collaborative Process Planning System

Aimed at security issues in collaborative process planning system, a multi-level and dynamic access control (PPMLDAC) model was proposed for collaborative process planning based on role based access control (RBAC) model. A multi-level permission model was discussed on the basis of product and task decomposition level structure. New concepts of permission and permission assignment were defined for enriching the expression ability and simplifying the permission assignment to realize access control of the system. Moreover, permission state was defined and permission state migration was brought into PPMLDAC model for user permission changing along with the change of collaborative process planning environment. Working team was presented to enhance the management of users and meet the requirements of dynamic change for the staff in collaborative process planning environment. Based on the practice, PPMLDAC model was efficient to control collaborative operations and improve the system security.