Reduction in Repair rate of Welding Processes by Determination & Controlling of Critical KPIVs
Keywords:Statistical Process Control (SQC), Process Capability Indices, Six Sigma, Variable control chart, Pareto charts, Standard deviation, Critical to Quality (CTQ), Analysis of Variance (ANOVA), DMAIC, Total quality Management
Six Sigma is being Implemented all over the World as a successful Quality Improvement Methodology. Many Companies are now days are using Six Sigma as an Approach towards zero defects. This article provides a practical case study regarding the implementation of Six Sigma Project in a Welding Facility and discusses the Statistical Analysis performed for bringing the welding processes in the desired sigma Limits.
DMAIC was chosen as potential Six Sigma methodology with the help of findings of this Methodology, Six Sigma Team First Identified the critical Factors affecting the Process Yield and then certain Improvement Measures were taken to improve the Capability of Individual welding Processes and also of Overall Welding Facility. Cost of Quality was also measured to Validate the Improvement results achieved after Conducting the Six Sigma Project.
Chen, K.S., Huang, M.L., Li, R.K. (2001). Process capability analysis for an entire product. International Journal of Production Research, 39(17), 4077-4087. http://dx.doi.org/10.1080/00207540110073082
De Mast, J., Roes, K.C.B, Does, R.J.M.M. (2001). The multi-vary chart: A systematic approach. Quality Engineering, 13(3), 437-447. http://dx.doi.org/10.1080/08982110108918672
Douglas, C.M. (2003). Introduction to Statistical Quality Control. New York, NY: John Wiley Publications.
Flaig, J.J. (2006). Selecting Optimal Specification Limits. Quality Technology & Quantitative Management, 3(2), 207-216.
Flaig, J.J. (2009). A unifying process capability metric. Journal of Industrial Engineering and Management, 2(1), 48-59. http://dx.doi.org/10.3926/jiem.2009.v2n1.p48-59
Jacobson, J.M., Johnson, M.J. (2006). Lean and Six Sigma: Not for Amateurs. LabMedicine 37(4):140-145. http://dx.doi.org/10.1309/9LHB-9G96-AHMT-9XG2
Laureani, A., Antony, J., Douglas, A. (2010). Lean six sigma in a call center: a case study. International Journal of Productivity and Performance Management, 59(8), 757-768. http://dx.doi.org/10.1108/17410401011089454
Mahesh, B.P., Prabhuswamy, M.S. (2010a). Improvement of Quality Awareness using Six Sigma methodology for achieving higher CMMI Level. International journal of advance research in management, 1(1), 20-41.
Mahesh, B.P., Prabhuswamy, M.S. (2010b). Process Variability Reduction through Statistical Process Control for Quality Improvement. International Journal for Quality research, 4(3), 193-203.Plecko, A., Vujica, H.N., Polajnar, A. (2009). An Application of six sigma in manufacturing company. Advances in Production Engineering and Management, 4, 243-254.
Ricardo, C., Allen, T. T. (2003). An alternative desirability function for achieving 'six sigma' quality. Quality and Reliability Engineering, 19 (3), 227-240. http://dx.doi.org/10.1002/qre.523
Linn, R.J., Tsung, F., Ellis, L.W.C. (2006). Supplier Selection Based on Process Capability and Price Analysis. Quality Engineering, 18(2), 123-129. http://dx.doi.org/10.1080/08982110600567475
Sivasamya, R., Santhakumaranb, A., Subramanianc, C. (2000). Control chart for Markov-Dependent Sample Size. Quality Engineering, 12(4), 593-601. http://dx.doi.org/10.1080/08982110008962624
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This work as of Vol. 11 Iss. 2 (2023) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike- 4.0 International License