OPTIMUM POLICIES OF REPAIR RATES FOR AIRCRAFTS AND ITS COMPONENTS | ||||
| International Conference on Aerospace Sciences and Aviation Technology | ||||
| Article 56, Volume 1, A.S.A.T. CONFERENCE 14-16 May 1985 r CAIRO, May 1985, Page 665-674 PDF (1.76 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asat.1985.26542 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| T. M. METWALLY | ||||
| MATERIAL PLAN/TING MANAGER, EGYPTAIR, CAIRO, EGYPT. | ||||
| Abstract | ||||
| Aircrafts and or its components are subject to failure during its normal.operation. These failures may be recti-fied at different repair rates Al, A2, A3....Ak with corresponding repair costs rj, r2, r3....rk. If a unit fails, (A/C or component), it costs C per unit time, where n is the state of the system. The problem is to choose repair policy; as a function of the state of the system; which minimizes the long run expected total costs of the system repair. A model is constructed to deal the problem in two cases: — Case of poission arrivals and exponential repair time. Case of general arrivals and exponential repair time. An optimization procedure is deduced for both cases, then the problem is computerized through a FORTRAN IV program, the model is then applied through a case study on EGYPTAIR fleet and the optimum policy is deduced through the model's computer program. | ||||
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