Multiple instances of a job.

Could you please let me know how to create/make a multiple instances of a job/process in ksh(shell scripting).

i.e., at present the parent script is calling another child/dependent script for only once.
What we want is, the parent script itself has to execute multiple times, and in each one it has to call it's child/dependent script.

Thanks in advance for any inputs.

append & at the end of the command to allow it to run as a sub-process. Example:

#!/bin/sh

run_job1 &
run_job2 &

wait  # pause here until all jobs complete