Most companies have the process written down somewhere. It is usually organised by team: what sales does, then what operations does, then what finance does. Each section is accurate. Read end to end, it describes something nobody experiences.
A job crosses four teams and comes back to two of them. Written by department, that journey is scattered across four sections, and the return trips do not appear at all, because from inside each team a job coming back looks like a new job arriving.
Write the same process in the order the work actually moves and the return trips become impossible to miss. So do the crossings, which is where the waiting lives.
We do this on paper in an afternoon, and two things tend to fall out.
Neither is anybody's fault. Both are invisible until the page is put in the order of the work.
A process document that runs to sixty pages will be read once, by the person who wrote it. We aim for something a new starter can read in a morning and recognise on their first day.
Short also means it can be kept current. The reason most process documents are out of date is that updating them is a project.
A description that lives in a folder nobody opens has the same value as no description. Put it where the job is: alongside the queue, in the system people already have open, on the wall if that is what gets read.
Written in the right order, kept short, and left within reach. That covers most of what a process document needs to do.