uhmm.. by using quartz? and e.g. the jBPM api?
Well, doesn't jBPM have its own scheduler? Although, AFAIK it can't be used for scheduling processes, signals only.
I'll have a look at Quartz tho, thanks for your suggestion.
Correct, It does have a scheduler, but as you mention for reminders, task due-dates etc... not for starting proccess