The increased use of "regulatory science" in decision and policy making is an important component in the governance of modern states. However, contrary to what one would be tempted to assume, the use of knowledge from advisory bodies is not straightforward. Health Technology Assessment (HTA) agencies are currently preoccupied with their impact on the health care system and the examination of more active dissemination strategies.
Taking the users' viewpoints into account in evaluation is increasingly recommended. The rationale and methods of user-oriented approaches have been described in theoretical papers. Less often reported are critical and empirical observations on how evaluators should interpret users' views. In the case of information technology, users' views may b gathered for the purpose of both evaluation and development. This double function is best served when a theory-driven framework clarifies the processes underlying the utilization of technology.