In general, the application of the systems approach, with a focus on (1) An open, concrete system of technical or socio-technical elements which is the focus of a SE life cycle . (INCOSE 2012) (3) A transdisiplinary 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.The Fellows Initiative on System and Systems Engineering Definitions was established in 2016, to review current INCOSE definitions of SYSTEM and SYSTEMS ENGINEERING and to recommend any changes necessary to align the definitions to a) current practice, and b) the aspirations of INCOSE’s 2025 Vision.The final topic in this KA, Applying the Systems Approach, considers the dynamic aspects of how these activities are used as part of the systems approach and how this relates in detail to (1) Interdisciplinary approach governing the total technical and managerial effort required to transform a set of customer needs, expectations, and constraints into a solution and to support that solution throughout its life.(ISO/IEC/IEEE 2010) (2) An interdisciplinary approach and means to enable the realization of successful systems.Any of the activities described below may also need to be considered (2) A problem, process, system, or application in which many activities are happening in parallel, the order of incoming events is not usually predictable, and events often overlap.(ISO/IEC/IEEE 2010) of the Overview of the Systems Approach topic at the start of this KA.(ISO/IEC/IEEC 2009)(2) Attributes of software that bear on the opportunity for its adaptation to different specified environments without applying other actions or means than those provided for this purpose for the software considered. Systems and software engineering -- System life cycle processes. (INCOSE 1998) to the behavior of the other elements and to the system as a whole. Geneva, Switzerland: International Organisation for Standardisation/International Electrotechnical Commissions / Institute of Electrical and Electronics Engineer. (Conrow 2008) situations described by activities from Identifying and Understanding Problems and Opportunities topic.The solution options proposed by the synthesis activities will form the starting point for the Analysis and Selection between Alternative Solutions.