To be specific, I'd call that functional redundancy, versus hardware redundancy. Be able to get the same thing done in different ways. NASA's Genesis mission w

To be specific, I'd call that functional redundancy, versus hardware redundancy. Be able to get the same thing done in different ways. NASA's Genesis mission was bit by this a while back. It had redundant parachute sequencers for a sample return capsule, but they were all assembled identically and with the G-sensors backwards. Consequently, they all failed in exactly the same way.