Fourth-party logistics is a conceptual framework and operational model within supply chain management focused on the holistic integration and orchestration of all logistics activities, representing an evolution beyond traditional service provision. As a research concept, it investigates the strategic management, coordination, and optimization of complex supply chain networks, often involving multiple third-party providers, technologies, and information flows. Key characteristics include functioning as a single point of contact, offering strategic oversight, leveraging advanced technology and data analytics, and managing end-to-end supply chain performance. Its significance lies in enabling enhanced supply chain efficiency, resilience, cost-effectiveness, and strategic alignment through comprehensive integration and expert management.