AbstractsEngineering

An important factor in the train industry is to assure a high level of safety and quality of the trains. The challenge is to satisfy passengers’ needs in terms of punctuality, safety and comfort at the lowest cost possible. To succeed a company should invest in maintenance work which will delay the equipment failure and prolong the product life-cycle of the trains. By improving the preventive maintenance work, a company will enable higher availability in traffic and have more time for corrective maintenance. The company Alstom Transport has 66 calendar hours to prepare the train for traffic when performing an A6 maintenance routine which is performed once every year on the X60 trains. The purpose of this project is to decrease the lead time of the A6 maintenance routine to at least 56 calendar hours at Alstom Transport in Älvsjö depot. This will be achieved by developing and implementing a common sequence of operations that will enable all the technicians to work according to a standard and minimize the variance in lead time. Operational improvement ideas will be developed to ameliorate the working conditions for the technicians and reduce the performance time for the most time-consuming operations. To achieve the objectives of the project, continuous observations and analysis of the current work methods have been performed. Discussions with technicians and the engineering team have complemented this analysis. A survey was held to create better understanding of the technicians’ points of view concerning the most problematic and time-consuming operations. Finally a timestudy has been performed to collect the necessary information for creating the standard sequence of operations. The operational ideas for improvement have led to better working conditions for the technicians and have decreased the total operation time for the A6 maintenance routine by 20%. Two sequences of operations have been developed during the project. The Current Sequence of Operations consist of 29 calendar hours and 104 man hours and will be implemented at the end of the project. The Future Sequence of Operations consist of 25 calendar hours and 89 man hours and will be implemented when the operational improvement ideas, developed during the project, are realized. Alstom Transport in Stockholm spends 32% of their total production time on this maintenance routine. The operational improvements developed in this project result in a 6.3% reduction of Alstom’s total production time. ; En viktig faktor inom tågindustrin är att säkerställa en hög nivå av säkerhet och kvalitet på tågen. Utmaningen är att uppfylla passagerarens behov med avseende på punktlighet, säkerhet samt bekvämlighet till den lägsta möjliga kostnaden. För att lyckas med detta, bör företag investera i underhållsarbete vilket kommer senarelägga utrustningens fallerande och förlänga produktens livslängd. Genom att förbättra det preventiva underhållsarbetet kan ett företag möjliggöra en högre nivå av tillgänglighet i trafiken och skapa mer tid för korrektivt underhållsarbetet.…