Increasingly, engineers build complex systems using networks of specialized subsystems that, together, create an emergent aggregate system which offers more functionality than the sum of the constituent subsystems.
This approach is termed Systems-of-Systems Engineering (SoSE)"Whereas systems engineering addresses the development and operations of monolithic products, SoSE addresses the development and operations of evolving programs. In other words, traditional systems engineering seeks to optimize an individual system (i.e., the product), while SoSE seeks to optimize network of various interacting legacy and new systems brought together to satisfy multiple objectives of the program." [Courtesy
Wikipedia ]
