I see your point, but isn't quality a tricky thing to measure? It's subjectivity causes measurement difficulties as even against a standard benchmark it is still the interpretation of those receiving the service determining the levels of competency or quality which is different for each person. Having a benchmark as a comparator is a starting point, but can we ever have a true indicator of quality performance? One may indeed fulfill the set brief, but the ability of one to fulfil that brief will depend on how those setting the brief understand it themselves.