This chapter addresses some management techniques used in a production system. It explains continuous and steady systems subjected to specific quantitative constraints. The chapter fulfills the settlements noting that interactions lead to adaptive processes. In such networked systems, there are so‐called retro‐actions: they are like an action associated with a feedback effect of a system, that is to say, an action on what gave rise to it. In all complex systems, whether technical, economic, biological or social, the authors can define a more general notion of a feedback loop. This is the so‐called “diffuse feedback”︁. The chapter also explains simplexification of interconnected networks. Simplexification is a concept belonging to complex systems such as simplification characterizes what is leaded to reductionism. Before unifying these two notions in a complementary set, the chapter details the properties behind simplexification.