Most companies and organizations require some form of IT system to be able to run their business efficiently. In order to get the right IT system, at the right price and at the right time, specialist competence is required that can analyze the needs of the business and reformulate them into requirements for technology.
Systems Engineering is a transdisciplinary and integrative approach to enable the successful realization, use, and retirement of engineered systems, using systems principles and concepts, and scientific, technological, and management methods.
Systems Engineering considers both the business and the technical needs of customers with the goal of providing a quality solution that meets the needs of users and other stakeholders, is fit for the intended purpose in real-world operation, and avoids or minimizes adverse unintended consequences.
(International Council of Systems Engineering)