针对航天企业在质量归零管理信息化过程中遇到的对归零信息和归零过程的多级、多任务和多角色访问控制问题展开研究.在构建面向集团-院-厂所的三级归零管理业务模型的基础上,分析质量归零过程中对归零信息和归零流程的访问控制需求,提出基于任务和角色的扩展访问控制( Extended Task&Role Based Access Control,ETRBAC)模型,该模型将型号权限、产品权限、组织权限和任务权限进行综合,实现了对归零信息和归零流程的多维度访问控制.在理论研究的基础上,设计开发了访问控制组件,并通过软件的实施,验证该访问控制策略的有效性.%Multi-level, multi-task and multi-role is the prominent characteristics of the close-loop control of quality problem process in the process of aerospace product development. In the development of software system for quality problem management, the access control function need to cover above three parts. On the basis of setting up a three-layer business model for close-loop control of quality problem process, the requirements of access control on information and workflow of close-loop control of quality problem were analyzed. The model of Extended Task and Role Based Access Control(ETRBAC) is proposed in which the product, organization,task and role are integrated in authority configuration. Based on the ETRBAC model,an access control component was developed, and its validity was verified through the application in enterprise.
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