The following paper presents and explains the implementation of a standard method for determining and evaluating the quality level of service sector entities. For this purpose, are established indicators, standards and features of the quality provided, with information on customer preferences previously analyzed. The growth of that sector in the world and in Peru, and the constant increase of the number of companies that offer a combination of products and services, generates that these companies aspire to continue to grow and worry about the loyalty of their customers. Thus, they seek to offer a differentiated added value and meet a care quality level for satisfy customer's needs. By applying this method in a particular company, weighted values (average) will be obtained, in preference order, together with a general qualification, according to the perceptions of its different types of customers. From this result, also, aspects considered important will be able to be improved, and their level of quality will be increased, generating specialization and customization in the service and growth of the sector.