关键词: 云服务, D-S理论, 可信评价, 服务选择

Abstract: In the cloud manufacturing environment, customers often face a huge amount of information and the lack of trust when they select cloud service resources. In view of the problem that how to select the trusted cloud service, a new method based on D-S theory is proposed. Six cloud service criteria are selected as the trusted characteristics set. The evaluation grade membership of each criterion is solved through the obtained qualitative and quantitative evaluation information, and then the utility preference degree of each criterion is derived as the basic probability assignment value of cloud service. The criteria weights are introduced to modify the basic probability assignment to reduce the conflict in the process of evidence synthesis. D-S theory synthesis rules are used to synthetize the evidences for trusted cloud services. The confidence interval of each cloud service is calculated to get the contrasting partial ordering relation of the cloud services. Finally, taking an auto parts manufacturer as an example, the feasibility and effectiveness of the proposed method are verified.

Key words: cloud service, D-S theory, credible evaluation, service selection