The other subsystems you mention would have to be implemented across your processes regardless because they address the scope of your process and are not customer specific. I know this isn't the answer you want to hear, but I hope it helps. The standard states that we must assure objectivity and validitiy in our assessment. Do you have any suggestions as to how this can be accomplished - or references to customer satisfaction models we could use. The inverse of customer dissatisfaction can be construed as customer satisfaction, but that is not the sense of the Standard.
Most organizations establish more direct ways of gathering customer satisfaction indicators.
In large part this involves trapping and reporting information that most employees are not accustomed to trapping and reporting. Be sure you keep evidence so that you can show the basis for the numbers. Customer surveys are another method that just about everyone uses. Now you're not relying on spontaneous expressions of satisfaction, but instead more or less prompting them. Many customers won't express dissatisfaction unless asked.