关键词: 多品种小批量, 虚拟工序, 相似工序质量特征, 公差系数法, 工序质量控制

Abstract: It is difficult to apply traditional Statistical Process Control (SPC) technology as it is short of quality character data. Classified coding system was constructed and analogical manufacturing theory was applied to classify procedures with same codes into same virtual procedure, thus virtual batch was composed and data shortage problem was resolved which laid foundation for procedure quality control applying SPC technology. In addition, tolerance data method was applied to translate character data into relative data. The data were plotted on control draft in order to judge procedure control state and estimate process capability index. Experimental results showed that the method could ultimately realize the procedure quality control under multi-type & small batch condition.

Key words: multi-type & small batch, virtual procedure, analogical procedure quality character, tolerance data method, procedure quality control