Abstract
In conditions of highcapital intensity, technological complexity, and dependence on the stability of logistics chains, increasing the operational efficiency of oil refineries requires a comprehensive analysis of business processes to ensure social sustainability and reduce organizational and managerial losses. The purpose of the research is to develop an integrated approach to the management analysis of an oil refinery's business processes, ensuring the identification of factors affecting the operational stability and efficiency of production processes. The methodological basis of the research was strategic and process analysis methods, including PEST analysis, Porter's model, SWOT analysis, and the Business Model Canvas, providing multi-level diagnostics of the macro environment, industry environment, internal environment, and the enterprise's business model. The results of the study showed that economic factors (1.48) and technological factors (1.13) have the greatest impact on the sustainability of the company's activities, while the highest ratings were given to the seasonality of demand for bitumen (4.80), the criticality of unplanned equipment downtime (4,80), the reliability of equipment after modernization (4.60) and government road construction programs (4.60). The key limitations of operational efficiency are mainly organizational and managerial in nature and manifest as underutilization of capacity, logistical gaps, unplanned downtime, and insufficient consistency in cross-functional processes. Findings concluded that it is necessary to integrate strategic analysis tools and lean manufacturing principles to increase the transparency of business processes, the sustainability of the logistics circuit, the quality of management decisions, and to strengthen the socioeconomic sustainability of the enterprise.