The Human Activity System: Emergence from Purpose, Boundaries, Relationships, and Context.

Systems engineering is a human activity system that depends on highly specialized technical knowledge to design, model and realize complex systems. However, as yet there is not enough specialized technical knowledge that can assist systems engineers to design and evolve the human activity systems as such. In this manuscript, we propose a human activity system model and a set of principles to guide the design and evolution of human activity systems that design, model, and realize complex engineered systems. The significance of this development for systems engineering is that attention is brought to the critical need to develop scientifically derived methods to design robust human activity systems [ABSTRACT FROM AUTHOR]