Roles carry the requirements, certificates the proof. Per person you see what is earned, what is open and what is about to expire.
In Oanax a role describes more than permissions: it carries what someone in that role must know and be able to do — which must-reads, which modules, which certificates. Whoever gets the role gets the requirements with it.
Per person you then see the real picture: earned certificates with expiry dates, running modules with progress, and what is still missing. Per role or department you see the same at a glance for the whole group.
That is the difference with a qualification matrix in Excel: this one updates itself, every time someone completes something.