Root Cause Analysis using Ishikawa Diagram for Reducing Chain Link Rejection

Manufacturing problems are very crucial, need vigilant and immediate attention otherwise it damages to company’s not only profit margins but also reputation. Quality Management includes quality assurance and control. It is an important technique to maintain and continuously improve quality of the product. Out of many techniques used to improve quality, reduce rejection, Ishikawa diagram is very well known and widely used. Ishikawa diagram is very useful to identify the probable causes of error or problem from different perspective. Our research is in chain link manufacturing, the Ishikawa diagram is used to identify various root causes for chain link rejection due to ovality problem. After detailed study of chain link manufacturing process and data gathering for many problems which causes rejections, first problem chosen to ovality problem and scrap of product, because it contributed heavily around 7% to 8% of total production. The root causes identified as outcome of Ishikawa diagrams implies that many causes behind rejections. To reduce the rejection related to chain link, identified causes have to priorities and attended. [1,2].