In systems thinking divisions apparent in science specializations are seen “as arbitrary and man made” (Checkland, 1981, p. 4). A key idea embedded in systems theory is that it can assist us in understanding of phenomena and that its holistic emphasis will promote orderly thinking. According to Checkland (1981), there are natural systems, designed systems, abstract systems, and human activity systems (p. 112). Human activity systems can be broken down into examples of open systems that are relationship dependent. Change is inherent in human systems, as the intricacy of the relationships in these kinds of systems require continuous adaptations if the system is to remain stable. Checkland viewed human activity systems as wholes that are emphasized by the existence of other systems.