Abstract: Object matters handled by each program constituting a work are assorted and classified into a system, and an ID information for discriminating the work is added to a definition information relating to the execution of the work and to an information representing the events which occur with the execution of the work, in order to achieve a unitary management. A priority is assigned to each event occurring with the execution of the work, and whether the information representing the event is to be transferred or stored is decided so as to accomplish the objectives described above.