There's an car dealership advertising a multiple-point certification for pre-owned vehicles. To me that translates into “checklist for used cars.”
That's what a certification for people based on book knowledge is also–a checklist that a person knew the right answer. Nothing about the experience or if the experience that led to that knowledge was successful.
Cars with a lot of experience are used. You want to see a certification that they still work. Car experience is no predictor of future experience, except that something is more likely to break, because of the experience.
People with lots of experience are also “used,” but people who've learned from their experience are more useful(valuable) than people who haven't. People who haven't learned from their experience are like new cars or uncertified pre-owned cars–you can't tell where they'll break. At least with people who've learned from their experiences, you might have more insight into where their experience is not useful.
A certification for a car tells you where the experience has (or might have) eroded the car's value. A certification for a person tells you nothing, except that the person studied for and passed a test. Don't confuse people with cars. A certification for used car is much more valuable than a certification passed by a person.