Systems engineering, abbreviated as SE, is an interdisciplinary approach and a systematic process used to design, develop, operate, and manage complex systems.  It encompasses a broad range of activities that focus on achieving desired functionality, performance, and reliability while considering the interactions between various components and subsystems within a system.  Systems engineering is widely used in various industries, including aerospace, defense, transportation, healthcare, telecommunications, and many others.  Its primary focus is on achieving system-level objectives by considering the interactions and dependencies between subsystems, components, and stakeholders, thereby enabling the successful development and operation of complex systems.