Processes associated with 7.1.6 could be (likely is) owned by many different people/functions depending on how your org. is set-up. Your QM or procedures should specify who is/are the process owner(s).
You can audit it as part of a process audit or a specific procedure audit. For example, maybe you have a key process called “Purchasing”. When auditing that process ask the Purchasing folks “How do you determine the knowledge necessary for the operation of your processes and to achieve conformity of products and services?” “How do you maintain and make available that knowledge?”