Abstract: | This communication presents newly developed mean‐time‐to‐failure (MTTF) formulae for systems with Erlangian‐distributed unit and common‐cause times to failure. These systems are parallel, triple modular redundant (TMR), r‐out‐of‐m, bridge, parallel‐series and series‐parallel. Copyright © 2000 John Wiley & Sons, Ltd. |