In other words, if we can theoretically complete a job in 10 seconds, and must complete it in 30 seconds, it has a maximum slowdown of 3. A system cannot meet real time demands unless it has the ability to reject jobs when necessary. If we must accept all jobs, one machine receives two jobs, and violates two real-time constraints.
Some jobs have a real time constraint or maximum slowdown.
The system can reject jobs as necessary to meet guarantees.