A job scheduling analysis method and system are disclosed in which a job schedule
is analyzed by use of historical job execution data in a computer system in which
a plurality of jobs are executed in parallel. Historical execution data of a plurality
of jobs and the file names of files accessed by the jobs are collected. The maximum
multiplicity of jobs capable of operating in parallel on the computer system is
inputted. When the file name of a file accessed by one job and the file name of
a file accessed by another other job coincide with each other, an execution start
condition of the plurality of jobs are determined to execute the one job and the
other job at the earliest instants within the maximum job multiplicity so that
the sequence of execution of processings by the one job and the other job is maintained
and the execution time of the one job and the execution time of said other job
do not overlap each other. Thereby, it is possible to simulate the influence of
a change in system construction and to search for an effective batch processing
with a reduced number of idle spaces.
