Launch a job N minutes after another

Hi all,

It is me again, and I have one basic question that I haven't figure out by myself.

How is it possible to constraint a job to execute only a certain period (let's say 15 minutes) after the end of its predecessor ?

I thought that we could use preconditions but these objects can only tell to launch or skip its script and not to wait.

Have you any ideas ?

Thanks,

Regards

Yi Jiang