Uptime Tier
Uptime Institute's I-IV classification of facility resilience, from basic (I) to fault-tolerant 2N (IV).
Current numbers
III: concurrent maintainability / IV: fault tolerance + continuous coolingUptime Tier III/IV outcomes: concurrent maintainability vs fault tolerance under the standard's defined conditions
Tier III / IV outcomesUptime Tier III concurrent-maintainability and Tier IV fault-tolerance outcomes under the standard's defined conditions