Schedule retrieval method for controlling schedules and schedule server apparatus with multistageous idle-time retrieval means

摘要

A method in which idle time retrieval is not lumped together but multistageously so that a burden on a host person for retrieving idle time for subjects of participation is lightened. The subjects of participation are divided into some groups so that idle time is retrieved group by group on the basis of a given retrieval condition. The retrieval is continued unless the retrieval is completed for all the groups.