1. A computer-readable, non-transitory medium storing a program used to direct a computer to perform the processes, the processes comprising: calculating, based on a common command commonly included in a plurality of process logs including a history of executed commands, a matching level of a process preceding the common command in the plurality of process logs, or a matching level of a process subsequent to the common command in the plurality of process logs; when the calculated matching level is equal to the matching level of the preceding process, outputting the matching level as associated with instruction manual data before the common command in instruction manual data including the common command; and when the calculated matching level is equal to the matching level of the subsequent process, outputting the matching level or a comparison result between the matching level and a specified threshold as associated with instruction manual data after the common command in instruction manual data including the common command.