Add Priority and confirmation to Wikis ?

Is there a possibility to add a extention like "priority" or a confirmation, that certain users have read the wiki ?

Priority:
I´d like to have e.g. 5 Stats like Prio 1,2,3,4,5 which my users also could search/list on the page

Confirmation:
That´s a really deeper issue: Use WIKI for a quality management page, in this I would like to see, which users have read which pages, so I know how far they are with their knowledge (and the user himself also !)

I know, that´s a rather simple description, but maybe there are still some existing solutions, so I don´t have to explain more....
Thanks
Greetings from bavaria
Richard