What Is Qualification?
Qualification is the process by which an implementation of a specification is tested to ensure that it faithfully follows the specification. Many major public specifications in the information technology and communications industries include some sort of qualification program. Often, these programs include a formal process and a set of test cases against which implementations are tested, and this is also the case for the Bluetooth qualification program.
Qualification is intended to help ensure that products correctly and completely (at least to the extent that completeness applies to a particular product) implement the specification. At least in theory, if all product implementations comply with the same specification, they ought to interoperate with each other (this is not strictly true in practice, which is why other mechanisms to promote interoperability are also in place).