Operational research OR is regarded by many as being in crisis. If OR is taken to be ‘classical OR’, this is indisputable … If, however, the definiti… - Mike Jackson

The traditional, scientific method for studying such systems is known as reductionism. Reductionism sees the parts as paramount and seeks to identify the parts, understand the parts and work up from an understanding of the parts to an understanding of the whole. The problem with this is that the whole often seems to take on a form that is not recognizable from the parts. The whole emerges from the interactions between the parts, which affect each other through complex networks of relationships. Once it has emerged, it is the whole that seems to give meaning to the parts and their interactions. A living organism gives meaning to the heart, liver and lungs; a family to the roles of husband, wife, son, daughter

Hard systems thinking is also accused of conservatism. It privileges the values and interests of its clients and customers, and lends its apparent expertise to their realization. It thus gives the facade of objectivity to changes that help to secure the status quo. In general terms, despite its many strengths and achievements, hard systems thinking is today thought of as having a limited domain of application.

The classification of a system as complex or simple will depend upon the observer of the system and upon the purpose he has for considering the system.