There is no system that can be fully automated. There will always be something fuzzy, ambiguous that can't be systemized and a human factor must be there to carry it out; for example development, research, response to unexpected changes in the environment, some sort of decisions
But in good systems you will find these things repeat themselves over and over and over … and they have a pattern that you can put it on paper, make a checklist or a kind of a flowchart, a diagram, this is what is meant by "SOP"
"SOP" let you define standards easily, qualify it, improve it. It makes it easier for you to get other people to learn these SOPs easily and be trained much faster
So, try to make SOPs for the stuff you can't automate... This will be a great help to you