Abstract: A machine for assisting crew itinerary production is proposed which alleviates the burden of operator's works and produces practical crew rosters in a short period of time. At first, old crew roster data are copied as they are as new crew roster data in the middle of production. Subsequently, among new train IDs corresponding to boarding section data constituting new itinerary data, the data which exist as new train IDs corresponding to new rolling stock operation data are adopted as they are, and the data which do not exist as new train IDs corresponding to new rolling stock operation data are eliminated, suspensions of the service being made to correspond to the data. The same processings are executed for all new itineraries. The train IDs which have not been allotted among new train IDs corresponding to new rolling stock operation data are classified into the unallotted group.