University of Tehran Press Advances in Industrial Engineering 2783-1744 52 1 2018 03 21 Mathematical Model for Fleet Assignment with Maintenance and Aircraft Ramping Scheduling مدل ریاضی تخصیص ناوگان، همراه با زمان‌بندی فعالیت‌های تعمیر، نگهداری و رمپینگ هواپیما 61 72 66291 10.22059/jieng.2018.207009.1121 EN Alireza Rashidi Komeijan Department of Industrial Engineering, Firuzkuh Branch, Islamic Azad University Firuzkuh, Tehran, Iran Mahsa Shabankareh Department of Industrial Engineering, Firuzkuh Branch, Islamic Azad University Firuzkuh, Tehran, Iran Journal Article 2016 05 24 The problem of routing and maintenance programming is one of the most important complex issues of aviation systems. Therefore, the factors that increase the delays and costs and make the passengers unsatisfied must be identified. Among these factors, is the time required for airplane ramping, inspection and maintenance operations that directly affect flight delay and related costs. This paper provides two new models for maintenance programming based on flight hours and scheduling of airplane ramp operations, which minimizes costs and delays. Two mathematical models are solved in GAMS and sensitivity analysis is performed for each. Results of sensitivity analysis show that an increase in the number of aircraft in maintenance model reduces costs, and an increase in the number of machines in ramping model reduces delays. So, based on the result, good performance of the models reduces the costs and delays. https://aie.ut.ac.ir/article_66291_c79454dbbb76c8b28ef8533406d55df9.pdf