Load information and a first processing time are provided in association with each of a plurality of first time segments that each have a fixed duration time and are included in a first time period, where the load information indicates a load condition of a target computer that executed a target job during the each first time segment, and the first processing time indicates a running time of the target job during the each first time segment. One or more first time segments each having a predetermined analogous relationship with a second time segment in a second time period during which the target job is expected to be executed by the target computer are selected to predict a second processing time indicating a running time of the target job during the second time period based on the first processing times associated with the selected one or more first time segments.