An operation management system is constituted by a management server and a plurality of machine tools connected to each other via a network. The management server manages the operation status of each of the machine tools and the work schedule of an operator conducting work with the machine tools, specifies a machine tool to be used by the operator in next work based on notifications from the machine tools and the work schedule of the operator, and instructs each of the machine tools to produce a display for guiding the operator to the specified machine tool.
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