"Process analysis identifies, describes, and explains the sequence of events in a repeatable process" (Lannon & Gurak, 2015, p. 270).
"Process description are appropriate when the reader needs to be informed about the action but does not need to perform it. If you suspect a reader may in fact be a user -- i.e., someone who uses your document to perform the process -- always write instructions" (Pfeiffer & Boogerd, 2007, p. 168).
Lannon, J.M., Klepp, D. & Gurak L.J. (2015). Technical communication (6th Canadian ed.).Toronto : Pearson Canada.
Pfeiffer, W., & Boogerd, J. (2007). Technical communication : A practical approach (4th Canadian ed.). Toronto: Pearson Prentice Hall.