how are you? It is passed so long time form your last post on lollypop, right?
This is my contribution for you question.
If you are doing an internal audit, you can use turle diagram to understand input/output for the process/activity under the scope of the internal audit.
It is a good method to also undestand and assess process owner, stakeholders of the process, procedures, reaction mechanism and controls , training , competence and awareness of the involved personnel , kpi and measurement, linked processes.
Based upon the usage of the turtle diagram , you can have a sort of "guide" to perform a process audit, a sort of path, trail, we can say.
If you want to map a process to present to an external entitiry ( customer, registra etc.), you can use turle diagrams to map your QMS processes so that you can have a list of process mapping with visual and depicted diagram
Hope this helps