The proportional allocation factor and the allocation formulae expressed in terms of failure rates and mean time between failures respectively are given.
Even though the mean time between failures of the hardware hasn't changed, the backups and scripts put in place mean that the data is safe and that you can quickly rebuild the environment, if needed.
If you know the mean time between failures and the mean time to recovery, e.g. for the hardware, use the calculations in this section.
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