What is a "good" Match Rating?

Our studies and numerous field trial results proved the following set of Match Rating guidelines to assist the refinisher in their decision making process.

Match Rating of 5 or less: Blendable for Solid colors
Match Rating between 0 and 10: Blendable for Metallic and Pearl colors
Match Rating between 11 and 20: Check with visual reference (spray out or chip)
Match Rating greater than 20: Tinting may be required