Few fields, such as healthcare, are currently subject to constant changes and innovations. One of the most common criticisms refers to the lack of a formal evaluation of the consequences on health and costs, as well as the ethical, legal and organizational aspects, have these innovations before their introduction and dissemination in clinical practice. systematically or even the little use of these evaluations in practice.

Since the available resources are always limited and face an almost infinite demand, since the same technology generates new needs, it is necessary to make difficult decisions about what to provide, how and to whom in short, prioritize, so it is of great importance.