In today's competitive global marketplace, the quest for efficiency, sustainability, and quality is at the forefront of organizational management. The implementation of international management standards—such as ISO 9001 for quality, ISO 14001 for environmental management, and ISO 45001 for occupational health and safety—has become widespread across industries. However, these systems are often implemented separately, which can lead to inefficiencies and resource redundancy. An Integrated Management System (IMS) offers a strategic solution by consolidating these disparate systems into a unified framework, providing organizations with a comprehensive, cohesive approach to management. This paper explores the evolution of management systems and the growing need for integration in response to globalization, increased competition, and stakeholder demands. By combining the principles of quality management, environmental sustainability, social responsibility, and occupational safety into a single system, organizations can streamline their operations, improve resource allocation, and enhance overall performance. This approach allows organizations to not only meet regulatory requirements but also achieve a synergistic effect, where the whole system performs better than the sum of its individual parts. Two primary models for integrating management systems are discussed: the additive model and the comprehensive integrated model. The additive model involves the step-by-step incorporation of additional systems into an existing framework, typically beginning with ISO 9001 for quality management and gradually adding systems like ISO 14001 and ISO 45001. This modular approach allows for flexibility and is easier to implement for organizations with existing quality management systems. However, the additive model can sometimes result in systems that operate in parallel rather than truly integrated. The comprehensive integrated model, on the other hand, is designed from the outset as a unified system. This approach ensures that all components are interrelated and work together seamlessly, minimizing duplication of processes and promoting better alignment of organizational goals. The integrated model fosters greater synergy and reduces the administrative burden associated with managing multiple systems independently. The paper also highlights the importance of adopting a structured approach to integration based on the Deming PDCA (Plan-Do-Check-Act) cycle, which is central to ISO management standards. The PDCA cycle provides a framework for continuous improvement, enabling organizations to adapt and refine their management systems over time. Through effective leadership and stakeholder engagement, organizations can achieve not only compliance with international standards but also significant improvements in operational efficiency and long-term sustainability. The benefits of integrated management systems are numerous: they reduce duplication, optimize resource use, and improve communication and coordination across departments. Moreover, an IMS enables organizations to respond more effectively to external challenges, such as changing regulations, customer demands, and environmental concerns. The paper concludes by advocating for the widespread adoption of integrated management systems, emphasizing that their success depends on both the structural framework and the active involvement of management and staff. As organizations continue to face complex, interconnected challenges, the integration of management systems is a crucial strategy for enhancing competitiveness, sustainability, and long-term organizational resilience. The future of organizational success lies in the ability to harmonize different management approaches into a single, efficient system that supports continuous improvement and adaptability in an ever-changing global environment.