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Engines stock control

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Mohammed Awad
Mohammed Awad

study to decide the number of engines in stocks based on cost and service level using statistical tools

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Engines Stock Control Cost vs Service Level By : Mohammed Salem MIDDLE EAST AIRLINE ENGINEERING & MAINTENANCE 2005 11 th Annual Conference Aviation Industry Conferences 15-16 March 2005 The Intercontinental Hotel Abu Dhabi, UAE
Objective ,[object Object],[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object]
Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object]
Philosophy - ESC ,[object Object],[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],A Cost of Spare Engines B Cost of Aircraft On Ground C Total Cost NUMBER OF SPARE ENGINES COST IN US$
Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object]
Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],time Stock Level
Techniques ,[object Object],[object Object],[object Object],Simulation Model Engine Fleet Repair Distribution AIRLINE SYSTEM Engine Fleet Demand Distribution Desired Service level Optimum Engines Number
Techniques ,[object Object],[object Object],AIRLINE SYSTEM ,[object Object],[object Object],Airline Operating System Same A/C Fleet - Engines Stock Level at T 1 = ( Current Level – 1 ) Stock Level at T 1 +T R = ( Current Level + 1 ) Calculate Cumulative Distribution Generate Random Numbers Calculate Corresponding Values of operating times Engines Failure Distribution Engines Repair Distribution Calculate Cumulative Distribution Generate Random Numbers Calculate Corresponding Values of repair times At Tentative values of stock level Run Computer program for 1000 trails Calculate Null Stock Cases And Service Level
Techniques ,[object Object],[object Object],OPERATING DISTRIBUTION Generation of Random Number (x) 100 x t 100 CUMULATIVE DISTRIBUTION SELECTING OPERATING DAYS OPERATING DAYS OPERATING DAYS OPERATING DAYS FREQUENCIES FREQUENCIES
Techniques ,[object Object],[object Object],REPAIR DISTRIBUTION Generation of Random Number (x) 100 x t 100 CUMULATIVE DISTRIBUTION SELECTING REPAIR DAYS REPAIR DAYS REPAIR DAYS REPAIR DAYS FREQUENCIES FREQUENCIES
Techniques ,[object Object],[object Object],ENGINES STOCK LEVEL DAYS (TIME ) OPERATING PERIODS REPAIR PERIODS
Case Study ,[object Object],[object Object],[object Object],[object Object],[object Object]
Case Study ,[object Object]
Case Study ,[object Object]
Case Study ,[object Object]
Case Study ,[object Object]
Case Study ,[object Object],[object Object],[object Object]
Case Study ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Airline Operating System Same A/C Fleet - Engines Stock Level at T 1 = ( Current Level – 1 ) Stock Level at T 1 +T R = ( Current Level + 1 ) Calculate Cumulative Distribution Generate Random Numbers Calculate Corresponding Values of operating times Engines Failure Distribution Engines Repair Distribution Calculate Cumulative Distribution Generate Random Numbers Calculate Corresponding Values of repair times At Tentative values of stock level Run Computer program for 1000 trails Calculate Null Stock Cases And Service Level
Case Study ,[object Object],[object Object]
Case Study ,[object Object],[object Object]
Case Study ,[object Object]
Case Study ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Case Study ,[object Object],By changing values of Fleet Size in U curve Technique The corresponding level of Spare Engines Stock level will be determined.
Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]
Thank You ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Engines stock control

  • 1. Engines Stock Control Cost vs Service Level By : Mohammed Salem MIDDLE EAST AIRLINE ENGINEERING & MAINTENANCE 2005 11 th Annual Conference Aviation Industry Conferences 15-16 March 2005 The Intercontinental Hotel Abu Dhabi, UAE
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