ABSTRACT
The user of a building's services should be sure that the appropriate services are available, which calls for good definition of demand, good choice from supply, and constant control of both (Tempelmans Plat and Van Wagenberg, 1997). This is the task of the facilities manager, usually working in the service-using organization, but who is not always recognized as such. Since the use of a building's services is rather often combined with exploitation of the building, and since all demand information should be clear to the supplier, the exploitation consequences of specified demand should be feedback influencing demand definition. Of course this relates mostly to cost consequences, to be distinguished, however, for services and solutions on various levels of decision-making.
