It is an Optimal dynamic Priority Scheduling Algorithm Priorities are assigned based on the absolute deadlines of the task, earlier the deadline, higher the priority. It is also called as Deadline Monotonic Scheduling (DM). If two tasks have the same deadline, then EDF randomly select one to execute next. The Schedulability condition for EDF is where U is the processor Utilisation Factor and it never be greater than 1. In practical, no processor will be utilised for more than 100%.