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Issue No:10, Vol.3 |
Oct - 2010 |
ISSN: 0974-5645 |
| RESEARCH ARTICLES |
Viewers & PDF |
| 3. Six sigma based exponentially weighted moving average control chart. R. Radhakrishnan and P. Balamurugan. Indian J.Sci.Technol. Vol. 3, Issue 10, pp: 1052-1055. Domain site: http://www.indjst.org. |
 
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- Abstract
A control chart is a statistical device used for the study and control of repetitive process. Shewhart (1931) of bell
telephone laboratories suggested control charts based on the 3 sigma limits. Now the companies started applying 6
sigma initiatives in their manufacturing process, which results in lesser number of defects, are focused in identifying the
causes due to assignable causes of variation. The companies practicing 6 sigma initiatives is expected to produce 3.4
or less number of defects per million opportunities, a concept suggested by Motorola (1980). If the companies
practicing 6 sigma initiatives use the control limits suggested by Shewhart, then no point fall outside the control limits
because of reduced variation. In this paper an attempt is made to construct a 6 sigma based exponentially weighted
moving average control chart specially designed for the companies adopting 6 sigma initiatives in their organization.
Suitable table is also constructed and presented for the engineers to take quick decisions.
- Keywords: Six sigma quality level, control chart, process control, six sigma.
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