1. Introduction
Traditionally, important companies have jealously stored their business data, using them only for reporting and auditing. However, in recent years companies have started to realize that the huge amount of available information offers a much broader scope. That is the reason why Data Mining techniques are quickly expanding, providing companies with key information. The present research wants to take a further step, with the aim not only to get relevant information, but also to use this information in order to improve and optimize the Business Processes of a Telecommunication Company.