Fuel supply shortages and price fluctuations pose significant challenges to the sustainability of fuel station business performance. These conditions require companies to strengthen vendor capabilities, integrate with supply chain partners, improve inventory management, and collaborate with them. This study aims to analyze the influence of vendor competency on vendor-managed inventory and supply chain collaboration, and the influence of vendor-managed inventory and supply chain collaboration on business performance, with supplier integration as a moderating variable. This study used a quantitative, survey-based approach. Data were collected via a Google Form questionnaire from 70 permanent fuel station employees. The sampling technique used was purposive sampling, while data analysis was conducted using Partial Least Squares-Structural Equation Modeling (PLS-SEM). The results show that vendor competency has a positive and significant effect on vendor-managed inventory but not on supply chain collaboration. Supplier integration has a positive and significant effect on vendor-managed inventory and supply chain collaboration. However, supplier integration moderates the relationships between vendor competency, vendor-managed inventory, and supply chain collaboration in a negative direction. In addition, vendor-managed inventory and supply chain collaboration have been shown to have a positive and significant effect on business performance. These findings suggest that improvements in fuel station business performance are more effectively achieved by strengthening inventory management systems, integrating information, and collaborating across the supply chain, rather than simply improving individual vendor competencies.
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