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In recent years, the SNCF Research Department has developed five different tools for monitoring production operations. This supervision has the potential to affect the whole production process. This paper presents the role played by the supervisory function in the production process and explains how this function contributes towards making the production process more efficient. In the second part, the paper describes the basic principles of the tools used for supervisory purposes, both as regards the information systems that support them, the alarm, browse and display functions used for the production data, and the functions supporting the decision-making process. In the rest of the text, the paper illustrates these principles by providing a brief description of two of the specific tools in use: GEDEON, for freight operations; and EXCALIBUR, for overall management of trains in circulation. In conclusion, we shall attempt to show the work necessary to make these tools more efficient, while recognizing that they can only be properly effective if associated with new forms of production organization better adapted to the target purpose.

A survey on SNCF decision support system tools to supervise and to pilot train traffic in operation