A management apparatus comprises a processor configured to execute a program and a storage resource configured to store the program, wherein the processor executes: an identifying process configured to identify an another job having a scheduled execution period overlapping with a scheduled execution period of an estimation subject job among a plurality of jobs executed at a first server from the plurality of jobs; a calculating process configured to calculate an islanding execution time in which the estimation subject job is executed individually at the first server based on the scheduled execution period of the estimation subject job and the scheduled execution period of the another job identified in the identifying process and a creation process configured to create a schedule which correlates the estimation subject job with the islanding execution time calculated in the calculating process.