If you don't have something pre-defined, like [a time frame of] four hours or 24 hours, then you begin rationalizing. Otherwise, you'll have people in there working on the system, stating: 'Give me another hour and I'll have it fixed.' Meanwhile, we're 10 hours beyond when we said we'd invoke the plan. So whatever metric you decide on, it needs to be determined beforehand. That way, if a breakdown occurs, there's no decision; you just invoke the plan.
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