The development of digital technology has significantly changed business patterns and consumer behavior in conducting transactions. Media Data Computer, a business engaged in computer sales, faces challenges in managing customer data that is not yet integrated, which affects the effectiveness of service and marketing strategies. This study aims to design an Electronic Customer Relationship Management (E-CRM) system to improve service quality and sales performance. The method used is descriptive analysis with a web-based system design approach. The results show that the E-CRM system is able to integrate customer data, facilitate the analysis of customer needs, increase customer loyalty, and support more effective and targeted marketing strategies
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