О.К.N.А. Marketing keep a record of window company ratings based on results of monthly monitoring. Every month the Center interviewers poll the managers of a hundred major companies, as well as companies engaged in active advertizing. During the interview they appraise the performance of managers, and based on this communication they rate the entire company. The company rating is founded on 100-point scale. The rating includes twenty companies, having got over 70 points for "sales quality", which is the evidence of professionalism and excellent service.

You can view the methodology of consulting manager rating here...