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Determine the mean system downtime for a system having a constant failure rate of 0.0521 failure per hour, a lognormal repair time with a

Determine the mean system downtime for a system having a constant failure rate of 0.0521 failure per hour, a

Determine the mean system downtime for a system having a constant failure rate of 0.0521 failure per hour, a lognormal repair time with a median value of 8.6 hr and s = 1.5, and a scheduled 4-hr preventive maintenance every 10 days.

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