I am by no means an expert on CA-7. I know how to trigger jobs by time of day, predecessor job completing, data set creation -- but I don't recall anything able to set how much time between jobs executing. AFAIK, CA-7 considers a successor job as ready to run as soon as the predessor job completes, unless you put a time-of-day requirement on the job.
And terminlogy is critical to IT, where similar terms may mean very different things. The Glossary in the CA-7 Job Management Primer
manual specifically provides the definition for "successor" as
successor. A job that runs after another job or an
output network whose tasks must be performed after
a job ends on the CPU.
Your definition of
Successor meaning it must successfully complete in order for the second job to start in CA7.
is not the same -- and may cause you problems eventually.