Optimization of maintenance actions in train operating companies - Fertagus case study Marie Méchain
[email protected] Instituto Superior Técnico, Universidade de Lisboa – Portugal June 2017 Abstract. Nowadays, efficient transport throughout Europe and the world has become a prerequisite for both freight and passenger travels. Railway transport still has to improve in EU in order to win market share from roads and sea in the future, but it is already an important mean of transport all over Europe. In Lisbon metropolitan area, Fertagus was the first private train operating company. This train operating company is running a line between Roma-Areeiro and Setubal and has its own maintenance yard. Therefore, optimizing maintenance costs is one of the main objectives of Fertagus train operating company. This work presents a mathematical model (which is a mixed integer linear programming model) that was implemented in FICO Xpress software. The model was validated and illustrated with a small-scale example. This mathematical model gives optimal technical planning as an output which reduces the cost of preventive maintenance. Real data was collected during meetings at Fertagus maintenance yard and is used in this work to obtain the minimal costs possible for preventive maintenance. Some sensitivity analysis is performed on some parameters of the mathematical model. Keywords: Maintenance optimization, Train operating companies, Mixed Integer Linear Programming. 1. Introduction the cheapest maintenance costs possible that still fulfil every deadline of the company vehicles. In transportation companies, maintenance has a Corrective maintenance on the other hand has a critical impact on both safety and availability. random nature and is hard to predict and thus hard to Indeed, it can be understood that if a vehicle is not optimize.