Active Redundancy
TL;DR
Aircraft hydraulic systems illustrate active redundancy: all three systems operate continuously, so failure of one leaves two functioning without delay.
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Multiple systems operate simultaneously, sharing load. If one fails, others instantly absorb its load without switchover delay.
Business Application of Active Redundancy
Aircraft hydraulic systems illustrate active redundancy: all three systems operate continuously, so failure of one leaves two functioning without delay. Active redundancy provides instant failover but requires continuous operation of all redundant systems, increasing costs.