The development of logical root cause analysis in manufacturing process for mitigation loss and waste

Abstract

This paper aims to develop an approach for identifying root causes of loss and waste in manufacturing process by reducing human judgments. The newly development of root cause analysis is the Logical Root Cause Analysis (LRCA) which has two elements as the Input, Material, Process, Product and Output Chart (IMPPO) and the Cause of Symptom Identification Method (CSIM). IMPPO is applied for characterizing manufacturing process while the other is for identifying the origin of root cause and symptom. Both methods have been tested with the industrial case. It is found that the root cause analysis (RCA) activity is achieved while human judgment isrequired less than the existing approach.