Résumé:
In this changing world and with the incredible growing of markets & enterprises during the globalization age, and with the big and strong competition to gain more profit and the customer loyalty and his satisfaction. CRM supported by technologies, data mining .etc. represented as an effectiveness and powerful solution for improve business relationships with customers. In this thesis, we take a live example for that Nessplus Telecom company, and we will to apply CRM approach by creating a data warehouse contain all daily transaction in well-formed, and show how we can extract a useful knowledge in graphic form (chart, tables...), for helps them to increase their gains.