Abstract: In order to enhance the validity and successful rate of resources scheduling in manufacturing grid (MGrid) system, reduce the decision-making time of selecting the optimal resource service and improve the quality of service (QoS) in MGrid, the re-sources optimal-selection system is developed. The concept of resource service Trust-QoS and the important roles played in resource management and scheduling in MGrid are presented, as well as the trust problems exist in the resource service Trading between resource service demanders (RSD) and resource service providers (RSP). A two-layer resource service Trust-QoS evaluation model is put forward, which includes Trust-QoS evaluation model in the same resources domain and the Trust-QoS evaluation model in different resources domain, and the quantitative Trust-QoS value are proposed and detailedly described, as well as the real-time and dynamic updating algorithm. The experiment results show that the pro-posed model and algorithms are effective and useful.

Key words: Manufacturing grid, Resource service, Resource service optimal-selection, Trust-QoS evaluation