Coordination (systems engineering) is the process and practice of managing the interactions, dependencies, interfaces, and behaviors among system components, subsystems, or constituent systems to achieve overall system objectives, emergent properties, and desired performance. Within the context of systems engineering, and particularly in System of Systems (SoS) engineering, this concept investigates the mechanisms, architectures, and strategies required to ensure that disparate, potentially independent elements operate cohesively, managing conflicts, maintaining coherence, and optimizing collective behavior. Effective coordination is fundamental to the successful integration, operation, and evolution of complex engineered systems, ensuring reliability, resilience, and the realization of intended capabilities.