Smart Scheduler only. Scheduling Priority is not enforced by manual scheduling rules.
There are four levels of priority for jobs – Critical, High, Medium and Low.
The Smart Scheduler treats them as follows:
Critical – Scheduled First
High – Scheduled Second
Medium - Scheduled Third
Low – Scheduled Fourth
Scheduling Priority is a required field and cannot be removed from a job. The default Scheduling Priority is "Medium". You can change the Scheduling Priority during job creation or by updating the job at a later time.