Treatment plans with electrolysis will vary with what you need and the electrolyst's suggestions.
In my case, the electrolyst suggested working on the chin area first. She wanted to clear a small area for me, with a good bit of psychology in mind. The idea was that I could touch that area, feel how smooth it was, and try to visualize that change over my whole face.
Once a quarter-sized area was clear there, she started to work on the upper lip and to expand that cleared area on the chin every session. The upper lip takes the longest to clear on most of us, so starting early there actually helps toward the end of the process, with the upper lip being 'done' more or less at the same time as the rest of the face.
Once the chin was cleared we continued to hit the upper lip regularly, and moved down to clear the neck. Finally, the cheek areas were cleared working bottom to top.
As the area to be cleared progressed, the electrolyst went back over previously cleared areas and zapped new hairs as the follicles woke to their active growth phase. These tend to be smaller, shallower follicles, and she could use a shorter probe and less energy in re-clearing.
At around 160-180 hours in, effectively the entire face had been cleared and each visit was dealing with hairs that had just started to emerge in the previous few weeks. The entire face could be re-cleared in a few sessions. I stopped shaving almost completely at this point.
I was completely re-cleared in one two hour session last week, what we called a 'fuzz hunt', and there's nothing to clear for this week on the beard. We're going to tidy up my eyebrows Monday. 😇