In today's rapidly changing business environment, companies need to be dynamic, adapting their internal processes to respond effectively to external changes. Information Technology has become crucial for businesses to enhance their ability to manage and adapt to change. This study examines East Java manufacturing companies that have heavily invested in sustainable IT systems to enhance their supply chain responsiveness and resilience through improved purchasing strategies and production flexibility. The study collected data from companies that had implemented IT for at least three years, with respondents being permanent employees with a minimum of two years' experience. Analysis of 108 survey responses using SmartPLS 4 revealed significant impacts of IT implementation on purchasing strategy (0.610), production flexibility (0.363), and supply chain responsiveness (0.164). Furthermore, purchasing strategy influenced production flexibility (0.367), supply chain responsiveness (0.348), and resilience (0.166). Production flexibility also affected supply chain responsiveness (0.348) and resilience (0.343), while responsiveness impacted resilience by 0.306. These findings provide a practical contribution for functional managers in companies regarding the importance of IT investment in developing effective purchasing, production, and marketing strategies to meet market demands swiftly. The research contributes to supply chain strategy and resilience theory while highlighting the significance of strong collaboration with external partners for top management.

This research was conducted by analyzing the factors that affect company performance with supply chain management practices, supply chain responsiveness, company capabilities and competitive advantage variables as intervening variables. This research method was a quantitative survey and the object of this research consisted of 460 distributors, at the level of lubricants retailers, in Indonesia determined by simple random sampling. The research data was obtained by distributing online questionnaires through social media and the questionnaire was designed using open statements with a Likert scale of 2 to 7. The analysis technique used was Structural Equation Modeling with validity test analysis, hypothesis testing using structural equation modeling techniques with smartPLS 3.0 software as a tool to assist data processing. The results of this study indicate that the company's ability had a positive and significant effect on the company's competitive advantage, supply chain management practices had a positive and significant effect on advantage, supply chain responsiveness had a positive and significant effect on competitive advantage, competitive advantage had a positive and significant effect on company performance and finally supply chain management had a positive and significant impact on company performance.