Ishikawa diagram applied to identify causes which determines bearings defects from car wheels

Abstract

Abstract The use of quality management tools plays a great role in improving the quality of products or services offered and helping to ensure the internal efficiency and effectiveness of the organization as well as improving customer satisfaction. Considering the advantages of using quality management tools, the author of this paper presents a study on the application of the Ishikawa diagram for the problem of bearing defects from car wheels. A list of potential causes that generated the studied problem was made. Brainstorming method has also been used in this regard. The identified causes have been classified into four main categories: Man (M), Manufacturing of bearings (M), Service - Bearing replacement (S), Exploitation of the car (E). It resulted a new model of the Ishikawa diagram, that has the formula 2M + S + E. The Ishikawa diagram determined and presented in this paper identifies the causes that generate a non-quality type problem. The diagram provides the advantage of a correct orientation to correct nonconformities, as well as the basis for further studies with other appropriate methods, solutions or measures to eliminate the causes. This case study presented in the paper may be the basis for other studies related to the proposed problem.