Abstract
For the multi specification and small batch productions, because of small batch and short manufacture cycle of product, it is difficulty to get enough sample data used for setup control chart to Statistical Process Control (SPC) of manufacture process quality by traditional SPC method. A new part code system based on OPTIZ code system is proposed by coding parts, manufacturing processes and qualities according to Group Technology (GT) based on similarity theory, so characteristics of parts, manufacturing processes and qualities are transformed to code, analyzed and judged by similarity theory to enlarge sample data, to realize SPC by control chart method. A SPC program for multi specification and small batch production based on group technology is developed by Visual Basic software and verified by actual example.
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