如果知道失效之间的平均时间和平均恢复时间(例如对于硬件)，则使用这一部分中的计算方法。
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.
相比之下，在四家或更多公司之间跳槽的“跳槽者”成为首席执行官的平均时间至少为26年。
"Hoppers" who jump between four or more companies, by contrast, take at least 26 years on average to become chief executives.
识别过程中任务之间的平均等待时间。
The average wait time between tasks in the process is identified.
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