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For adapting the demands of the rapid changing and enhancing the competing capability of enterprise in the international market, various modern manufacturing systems have been put forward, which are aimed at various specifications, perfect performance and high quality, low production cost and short manufacturing cycle of products, virtual manufacturing system ( VMS) has been emerged as the times require, which is effective technology to meet the challenge of 21 century's manufacturing industries. Based on analyzing modern manufacturing systems, according to the characteristics and requirement of VMS, in this paper, the architecture, the key technologies and the implement way of VMS were explored, and development environment for VMS was put forward, which is a powerful tool for building VMS.

Since the quality activities is through out the product whole life-cycle, the quality management should be a integrated quality system, facing the product life-cycle. In CIMS(Computer Integrated Manufacturing System), with the assistance of computer and its relative technologies, IQS(Integrated Quality System) can integrate the quality management technique cells into an organic whole, then the quality management will be more coherent and efficient. In this paper the concept, features, components and functions of IQS are been discussed and the key technologies are pointed out.