A system includes a management device and nodes that execute plural jobs in parallel. When a total electric-power consumption of the nodes reaches a threshold, the management device extracts a first job of the largest electric-power consumption from among the plural jobs, based on information about an electric-power consumption of each node and information about the plural jobs that are executed in parallel by the nodes. The management device reduces the electric-power consumption of a first node that executes the first job when a remaining execution time of the first job, which indicates a period of time from a current time until a scheduled end time of the first job, is longer than or equal to a predetermined time, and reduces the electric-power consumption of a second node that does not execute the first job, when the remaining execution time of the first job is shorter than the predetermined time.