Title: Capability enhancement of a metal casting process in a small steel foundry through Six Sigma: a case study

Authors: B.N. Sarkar

Addresses: Organisation Engineering and Planning Department, PO Box No. W–179, Tata Steel, Jamshedpur 831001, India

Abstract: Six Sigma is a proven disciplined approach for improving measurable efficiency parameters for any organisation. In this case study, Overall Equipment Effectiveness (OEE) for a 0.5 Ton induction furnace, which is a metric for Total Productive Maintenance initiative, has been calculated. As this performance was below the expectation level and resulting into outsourcing of jobs at higher cost, the Six Sigma methodology for overall improvement of performance of the furnace and the steel foundry was taken up. This case study shows how Define, Measure, Analyse, Improve, and Control (DMAIC) methodology of Six Sigma has been applied for process improvement considering OEE as a parameter. A multi-functional team of five members was formed. The application of statistical data analysis was performed with the help of standard statistical software packages like MINITAB and STATISTICA. Successful implementation of this project has helped to turnaround the foundry and stopped drainage of capital through outsourcing after successful completion of the project.

Keywords: CTQ; normality testing; OEE; process capability; six sigma; TPM; total productive maintenance; overall equipment effectiveness; critical-to-quality; metal casting; small foundries; steel foundry; India; furnace performance; DMAIC; process improvement.

DOI: 10.1504/IJSSCA.2007.013389

International Journal of Six Sigma and Competitive Advantage, 2007 Vol.3 No.1, pp.56 - 71

Published online: 24 Apr 2007 *

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