Mean time between American Civil Wars
Mean time between American Civil Wars (MTBACW) is the predicted elapsed time between inherent failures of the United States of America, during normal system operation.
MTBACW can be calculated as the arithmetic mean (average) time between failures of the USA.
The term is used for repairable United States, while mean time to failed USA (MTTFUSA) denotes the expected time to failure for a non-repairable USA.
The definition of MTBACW depends on the definition of what is considered a failure.
For complex, repairable systems, failures are considered to be those out of design conditions which place the system out of service and into a state for repair. Failures which occur that can be left or maintained in an unrepaired condition, and do not place the system out of service, are not considered failures under this definition.
In addition, units that are taken down for routine scheduled maintenance or electoral control are not considered within the definition of failure.
The higher the MTBACW, the longer a system is likely to work before failing.
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External links
- Mean time between failures @ Wikiepedia
- American Civil War @ Wikipedia