Technological growth is increasing from year to year, this is indicated by the use of computers in all aspects, be it service companies, trade, or industry, ranging from small, large, to multi-national companies. KAMDATU is the procurement of office furniture. The supply chain process at CV. Kamdatu involves several external parties, namely suppliers, customers, shipping, and management. The problems faced by CV. Kamdatu is located in a sales and purchase processing system that is still manual (not yet computerized) so that it is prone to calculation errors, searching for item data, and delays in stock information, in addition to recapitulating reports takes a long time because employees have to recap data first this is because the absence of management in the purchase of goods and production The E-Supply Chain Management system that will be applied to CV Kamdatu focuses on the automation of information between companies, suppliers, consumers and delivery of goods. Inventory and fulfillment of customer orders are more controlled. Based on these problems the researcher uses a methodological method, namely the Unified Approach (UA) UA, which is an object-oriented development methodology that combines existing processes and methodologies with uses the Unified Modeling Language (UML) as the modeling standard. The result of this research is to produce an application that has features that support the processing of buying and selling transactions