Equating uptime to sigma level
- October 24, 2002 at 3:08 pm #30621
Ronan McGinleyMember@Ronan-McGinley Include @Ronan-McGinley in your post and this person will
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My project goal is to increase uptime in a manufacturing orgainsation that has seven manufacturing lines. The overall uptime in the factory is 54%, with differences between each of the lines.
Can I equate % uptime to a sigma level, with perhaps the following rationale. 54% uptime is 46% downtime (including setup time); 46% equates to a sigma level of 1.6.
0October 24, 2002 at 4:16 pm #79962
Instead of trying to increase just your uptime you should look into Stable Operations. This is a measurement that looks at daily yield based on quartiles i.e. 2nd/3rd quartile. Once you have a high stable ops number > 90/95% then I would look at uptime. Essentially you are reducing the variation with the Stable Operations process.
Maybe you have already done this.0October 25, 2002 at 12:31 pm #79999
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