“…According to the descriptive classification of Zablah et al [44], CRM is described in the available literature as a (1) process [18,19,21,30], aiming at establishing the relational flows and developing the process of creating and sustaining a fully profitable portfolio of relationships with the customers; (2) strategy [16,19,[21][22][23]25,[32][33][34]45], aiming at embedding the customer satisfaction-retention-loyalty chain to develop sustainable relationships with the customers that are (potentially) valuable; (3) philosophy [44], aiming at achieving customer centricity for the organizational sustainability; (4) capability [29], aiming at developing the organizational knowledge and capability to construct the sustainable relationships with the respective customers toward business excellence; and/or (5) technological tool [17,24], aiming at mingling marketing, sales, and knowledge-capable systems to create partnerships.…”