فهرس المقالات U.A Ali المقاله 1 - Analysis of Mean Time to System Failure and Availability of a System with Cold Standby Unit 10.30495/jiei.2022.1944196.1175 Muktar Umar Danjuma Bashir Yusuf U.A. Ali Journal of Industrial Engineering International , العدد 1 , السنة 18 , زمستان 2022