Taking the manufacturing and assembly process of escalator step chain as an example,a systematic and structured process certification method based on DMAIC is proposed to reduce process variation and ensure process control and sufficient capability.The main method is to identify the key product characteristics(KPC)through flow chart,SIPOC,PFMEA and other analysis at first;Then MSA,control chart and process capability analysis are carried out for each KPC to understand the current process capability level.For KPC whose process capability does not reach the standard,root cause analysis and improvement actions are taken to ensure that the process capability is above 1.33;finally,it is proposed to update the quality document,develop the process control and process capability regular tracking plan.
维普
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