Havayollari tamir bakim servis saʇlayicilari için bir üretim çizelgeleme modeli ve analizi

Translated title of the contribution: A production scheduling model and analysis for the maintenance repair and overhaul service providers

Kadir Ertogral, Murat Erkoc, Doʇukan Hazar Ülker

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Maintenance, repair and overhaul (MRO) are regulated and necessary activities for the airline sector to ensure the safety and continuity of flights. Both military and commercial aircrafts must go through MRO at regulated intervals. MRO activities constitute the second largest cost component for the airline companies after the fuel. One of the important differences between MRO systems and traditional production systems is the use of rotable inventory for some expensive parts or modules. In the rotable inventory case, the arriving part for service is directly exchanged with a ready inventory. Thus, the customer airliner continues its flights with almost no break time. The MRO company overhauls the exchanged equipment and places it as ready inventory to be used for future demands. As MRO companies schedule the exchanges of rotable inventory and overhauls, considering the last date of service, they should try to bring in the aircrafts as close as possible to their regulated final dates for overhauls, since the earlier arrivals will not be preferred economically by the airline companies. The limited production capacity and inventory are the main constraints for scheduling the production. In this study, the problem is modeled with the assumptions of limited initial inventory and production capacity, multiple types rotable inventory and finite planning horizon, with the objective of minimizing the total earliness. We tested the problem thorough detailed numerical experiments. We have shown the decreasing marginal benefits for an additional unit of initial rotable inventory or additional process line and the relationship between this benefit and process time and process capacity.

Translated title of the contributionA production scheduling model and analysis for the maintenance repair and overhaul service providers
Original languageUndefined/Unknown
Pages (from-to)513-522
Number of pages10
JournalJournal of the Faculty of Engineering and Architecture of Gazi University
Volume30
Issue number3
StatePublished - 2015

Keywords

  • Maintenance repair and overhaul
  • Production scheduling
  • Rotable inventory

ASJC Scopus subject areas

  • Engineering(all)
  • Architecture

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