The concept of complexity in organisations and information systems

The definition of complexity is discussed, both in general and, mostly, in relation to organisations and information systems. Considering the subjective nature of complexity, complexity is defined as the effort (as it is perceived) that is required to understand and cope with something, but several other definitions and characterisations are also considered. Complexity is related to variety and information. The infological relation is reversed, and it is argued that there is a certain connection between information loss and the complexity of an information system. It is also argued that organisations and information systems can benefit from being simple, even if that would mean a decrease in variety. There seems to be a (somewhat obscure) connection between the limitations of our short‐term memory and what we perceive as complex. It is desirable to empirically verify the characterisations of complexity that previous researchers have made.