Need to apply Update 9 in JDE 9.2.7.3

Hi team,
My current JDE version is 9.2.7.3. we are planning to apply UN9 to our system. I am not aware about the process as I have never did it can someone please guide me with the steps in details.
One thing before me other person has upgraded JDE 9.2.5 TO 9.2.7.3 that time they applied planner esu. Further after that they applied UN7 but only on DV and no other environment and i dont have any documentation of it. Oracle said you can directly apply Un9 without any issues.
I prepared rough...

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