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Reduction in time between coils in a steel industry using six sigma
1. Abstract:
Amongst various approach of productivity improvement six sigma is an impressive methodology due to its strong basis of defining the problem, defect and setting target to be achieved. In the present paper, Mean time between coils of steel rolling mill was decided to reduce from 3.83 to 3.00 min using six sigma methodology. The opportunity of reducing the Mean time between coils was sensed by company through the minutes of meeting and brainstorming, the production of HRC coils was 2.0 Lac MT/month with Mean time between coils 3.83 min. and to achieve the production of 2.5 Lac MT/month, Mean time between coils need to be reduced to 3.00 min.
2. Six sigma
Six Sigma refers to the reduction of errors to six standard deviations from the mean value of a process output or task opportunities, ie about 1 error in 300,000 opportunities. In modern practice, this terminology has been applied to a quality improvement methodology for industry.
Six Sigma is a quality management program to achieve "six sigma" levels of quality. It was pioneered by Motorola in the mid-1980s and has spread to many other manufacturing companies. GE Aircraft Engines operates at Nine Sigma levels of quality. It continues to spread to service companies as well. In 2000, Fort Wayne, Indiana became the first city to implement the program in a city government. Read more
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