The term RATING SYSTEM can be broken down into two crossword solutions: SCALE (5 letters). A rating system is a method of evaluating or measuring the quality, quantity, or level of something. It is often used to measure the performance of an individual or organization. A SCALE is a set of values used to measure or compare the level of something. For example, a rating system might use a SCALE of 1-10 to measure the quality of a product or service.