Methodology:
Monthly waves are used. Each month, the client offers a list of those consumers who should be contacted during the wave. The components of the degree of satisfaction are evaluated in terms of the client's degree of importance

The main advantage of this system is:
- It offers a series of market indicators of the consumer's level of satisfaction and can be used annually or in a continuous way.

Gercomp develops this kind of survey with the following sector:

Sector	Surveyed Universe
Car post-purchase	Owners of the "X" make of car who went to the appropriate dealers hip to have the car service
Consumer relations	Consumers who contacted the Custumer Service Departament of the "X" company last mouth
Car advertising	Car owners who intend to by another car within the next 12 months
Business air travel	Consumers who took a flight abroad on business last month
Supermarkets	Consumers who bought at supermarkets of the" X" chain last mouth