Turn how I do this into an SOP

Step one, the interview:

I'm going to explain how I do [TASK]. Before writing an SOP,
interview me: ask about anything unclear, any decision points
where "it depends," any tools or access required, and any step
I likely skipped because it's automatic to me.

Here's my rough explanation:
[EXPLAIN THE TASK, as you'd tell a new person]

Don't write the SOP yet. Ask your questions first.

Once the interview feels thorough, ask for the document:

Now write this as an SOP:
1. Purpose (what this accomplishes and why it matters)
2. What's needed before starting (access, tools, information)
3. Numbered steps, one action each
4. Decision points, stated as "if X, do Y; if Z, do W"
5. What "done" looks like