 |
It has been suggested that this article or section be merged into Uptime. (Discuss) |
The colloquial term nines is used in engineering to indicate reliability or purity (or similar quantitative descriptor). It is preceded by a number indicating the degree of such reliability or purity. For example, 0.999 (or 99.9 percent) pure silver would be 3 nines pure. Or, for example, electricity that is delivered without interruptions (blackouts, brownouts or surges) 99.999 percent of the time would have 5 nines reliability. Interestingly, reliablity can be considered a time based purity. Also related are the topics of defect rates, Parts-per notation, MTBF and MTTR.
See also
- Uptime
- High availability which has a table that shows the conversion from "nines" to the amount of time a system would be unavailable in a year.
 |
This engineering article is a stub. You can help Wikipedia by expanding it. |
This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see full disclaimer)
