抄録
A large number of customers use JR East stations every day, and if station equipment has a failure, it is an inconvenience to those customers. The conventional maintenance consists of periodic maintenance in which inspections are conducted periodically and the after-the-fact maintenance in which maintenance is conducted after a failure has occurred. Introduction of the Suica system in 2001 made it possible to establish an inter-station network, and the introduction of the TOMAS in 2003 has enabled the easy detection of the operating condition of each piece of equipment. By making use of error data which is a part of the operating condition information, we began studying the maintenance that performs inspections before a failure occurs. By analyzing the error data, we found that specific error data appears before an occurrence of a failure; and we analyzed the relationship among the number of times error occurred, the period of occurrence, and the actual failure for each error data. By doing so, we established a condition-based maintenance in which characteristics of occurrence of error are monitored and an inspection is conducted before a failure occurs. Hereafter, the condition-based maintenance which uses the error data is referred to as TMM (Tomas Monitoring Management). As the result of introduction of the TMM, the number of failures was reduced by approximately 30 percent at stations where TMM has been implemented, which proves that the system can be provided for practical use. In this report, the authors will describe the introduction process of the TMM, method of analyzing error data, and the method of formulating efficient and optimal inspections. *TOMAS is a system which accumulates data indicating the operating condition of each piece of equipment.
