د. وليد عبد الفتاح البدوي

????? ????? ?????? ????? ?? ???????? ?????? ?? ???? ?? ???????? ????????? ?????????? ???????? ??????????? ? ???? ???????? ??? ????? ?????? ????? ?? ???????? ????????. ????? ????? ?????? ?????? ????? ????? ????? ????? ???? ?????? ?? ?????? (??????) ???????? ??????? ???. ??? ???????? ?????? ?? ??????? ???????? ????? ?????? ??????? ?????? ?????? ???????? ???? ??? ????? ?? ??????? ?? ????? ??? ?????? ?????? ?????? ???????? ????? ?????? ???????. (1-1-1) ????? ????????: ???? ???????? (Reliability) ?????: "?????? ??? ?????? ???? ???? ????? ????? ??? ???? ????? ????? ???? ????? ?? ??????? .
El Sayed (1996) "(Failures) ????? ???? ??????? ???????? ?????? ????? ?????? ?? ???? ??? ?? ?????? ???? ????? ???????. ? ?????? ?? ????? ??? ???? (Component) ???? ?? ????. (1-1-2) ????? ?????? ???????: ???? ?????? (?? ??????): ???? ?????? ?? ???????? (???????) ????? ???? ?????? ???? ???? ???? (?????) ??????? ????????. El Sayed (1996) ???? ???? ?? ????? ?????? ????? ? ????? ????? ????? ???? ????? ??? ????? ????? Charng (1981) ? Tsarouhas (2010): 1.?????? ???????? (Series system): ????? ?????? ???????? ?? k ???? (Subsystem) ?????? ???????? (????????).
????? ?????? ???????? ???? ?????? ??? ???? ???? ??????? ???? ???? ??? ?????? ?????? ??? ?????? ?????. ???? ???? ???? ???? ??? ????? ??? ?????? ???. ?????? ???????? ?????? ?????? ????????