Aneurin Bevin, founder of the National Health Service, was clear that there would always be a greater demand for services than could be met by available resources. This continual need to try to balance demand and supply however done is one of the key components in developing sustainable healthcare services.
Again, there are two main components. Firstly, there is the need to seek to achieve a balance between services that prevent illness and ill health and those that treat sickness. Secondly, there is the need to make best use of the available resources whether people, equipment or finances so that there is efficiency in the health care delivery system.
These two themes are illustrated in the following sections.