use
fun useOperatingTimeBasedFailures(operatingTimeToFailure: RVariableIfc, timeToRepair: RVariableIfc)(source)
Configures operating-time (usage) based failures: the resource fails after operatingTimeToFailure units of busy time accumulate, and is down for timeToRepair. The operating clock advances only while the resource is busy and on shift; it pauses while idle, off-shift (capacity 0), or failed.