As suggested above, several fields of management have been perceived in relation to urban areas. The two major ones need to be distinguished, so that the attention given to each in practice can be properly balanced with need. The first is concerned to manage activities within organisations and can be called organisational management. Its objects are organisations - including those of government - which are actively engaged in running a city or town. Its purpose is to achieve quality in the performance of an organisation. Efficiency may be one of the key measures of this performance.