Chi-squared control chart for multiple attributes

• Main Authors: Haridy, Salah, Wu, Zhang, Flaig, John
• Other Authors: School of Mechanical and Aerospace Engineering
• Format: Article
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Mechanical engineering
• Online Access: https://hdl.handle.net/10356/101576; http://hdl.handle.net/10220/16802
• Institution: Nanyang Technological University

In recent years, attribute control charts have been increasingly adopted in manufacturing processes and service sectors for monitoring the quality characteristics that cannot be numerically measured. The multiattribute control charts have been proved to be more effective than the simultaneous multiple individual charts for monitoring multiattribute processes. In this paper, a new multiattribute chi-squared (Χ²) chart is proposed to monitor the processes in which more than one type of defects exist on the non-conforming item. Some practical examples are given to illustrate the effectiveness of the new chart in monitoring the multiattribute processes compared with that of the individual p charts and other multiattribute charts.