These are the kinds of rating systems that review websites and publications offer up on a regular basis. They are then processed by aggregated review sites like Metacritic and the final results are spewed out in the form of "83" or some other number out of a hundred which, devoid of an explanation, tells the consumer absolutely nothing about the game itself. In fact the only thing that can be garnered from review metrics is a vague idea of how reviewers felt about a specific game.
Recently on the Giant Bombcast there was a discussion regarding game cost vs longevity. The conclusion was jokingly that Giantbomb should dump it's current review system and instead just have a screenshot, price and minimum-hours-to-complete label. While this might sound like a silly suggestion it actually conveys more meaningful information that the star rating system currently in use.