Carr-Saunders and Wilson (1933) have described the professionals as a phenomenon that once aroused to meet specific needs in society: a priest saves a soul, a lawyer his client and a medical doctor hopefully cures the patient. According to Larson (1979) professionalism consists of a cognitive, a normative and an organizational part. The cognitive part includes specialist knowledge and long training, the normative part ethical standards and a commitment to provide a service for the public good. Then a professional is normally also regulated by an organizational body with disciplinary powers that support these cognitive and normative elements. Professional and specialist knowledge is a matter of both formal education based on scientific knowledge and skills (Abbott, 1988). A professional has the same education as others in the same field but there are better and less good professionals. The difference lies in their capacity to learn from their experience, and of acquiring “tacit” knowledge. Tacit knowledge consists, among other things, of search rules, or heuristics, that identify the problem that is in focus for the professional and the elements consisting of the solution (Polanyi, 1966).