On your level 0 diagram you have a process #2 and when you create a level 1 diagram for process #2,you might have processes like:
A)2.1,2.2,2.3
B)2-1,2-2,2-3
C)2A,2B,2C
D)2-A,2-B,2-C
E)2-initial,2-main,2-end

Question

Quizplus · Accepted Answer

Using numbers with decimals (e.g. 2.1, 2.2, 2.3) is a commonly accepted and understood convention for creating level 1 processes that branch off from a level 0 process.

On Your Level 0 Diagram You Have a Process #2