There is a lack of information flow from job shop environment to the CAPP (computer aided process planning) system, which prevents a CAPP system from being more practical. THCAPP-G (CAPP for garment, developed by Tsinghua University in 1994) is a two-stage, nonlinear, closed-loop and dynamic process planning system. It generates process plans taking advantage of the flexibility of the manufacturing process and job shop environment, according to the dynamic status of the job shop environment. Techniques of ES (expert system), CPA (critical path analysis), and heuristic method were utilized comprehensively. An information flow between job shop environment and CAPP system was realized in this system. The developed ideas and system structure are discussed mainly in this paper.
Computer integrated manufacturing system (CIMS), as an advanced methodology, has been applied in many industry fields. There is, however, little research on the application of CIMS in the garment industry, especially on the integrated approach to CAD, CAPP, and FMS in garment CIMS. In this paper, the current situations of CAD, CAPP, and FMS in the garment industry are discussed, and information requirements between them as well as the integrated approaches are also investigated. The representation of the garments' product data by the group technology coding is proposed. Based on the group technology, a shared data base as an integration element can be constructed, which leads to the integration of CAD/CAPP/FMS in garment CIMS.
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