"logical prerequisites" = job dependencies
It's all fully documented here:
https://go.documentation.sas.com/api/docsets/scheduleug/9.4/content/scheduleug.pdf (page 55 and later)
But: If it's only a problem of control table locking and not about real dependencies like Job A creates a table which is required as input for Job B then don't define dependencies but solve the issue of table locking and write access concurrency.
I don't even use the SAS Flow Manager...
But I typed "SAS flow manager dependencies" into Google, and got "About 626,000 results".
Perhaps you should read the first few hits?
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