Are you looking to monitor jobs that show up via SM37? Does this also include BI/PI job monitoring as SolMan 7.1 does have some specific ways to set a time limit on something like a BW process chain so if it exceeds 24 hours to notify people.
If this is SM37 items, then do you have a centralized job software? SAP provides Redwood, Cisco provides Tidal, etc etc. You can rely on those systems to notify you for long running jobs.