System

From EvoWiki

System (from Latin systēma, in turn from Greek σύστημα systēma) is a set of interacting or interdependent entities, real or abstract, forming an integrated whole. The concept of an 'integrated whole' can also be stated in terms of a system embodying a set of relationships which are differentiated from relationships of the set to other elements, and from relationships between an element of the set and elements not a part of the relational regime.

There are natural and man-made (designed) systems. Man-made systems normally have a certain purpose, set of objectives. They are “designed to work as a coherent entity”. Natural systems may not have an apparent objective but they are sustainable, efficient and resilient.

A system is a fundamental concept of systems theory, which views the world as a complex system of interconnected parts. We determine a system by choosing the relevant interactions we want to consider, plus choosing the system boundary —– or, equivalently, providing membership criteria to determine which entities are part of the system, and which entities are outside of the system and are therefore part of the environment of the system. We then make simplified representations (models) of the system in order to understand it and to predict or impact its future behavior.