The evolution of the assessment and development of nursing competences in the Italian health-care system. The issue of the skills, in health care organizations, received a boost in the last 15 years as a result of contractual innovations that recognized different career levels in the nursing profession, and of the widespread dissemination of quality systems for certification or accreditation for excellence. These events prompted organizations to assess the competence of their professionals. A further stimulus was given by the recent debate on nursing sensitive outcomes, by the changes in patients' needs and by the increased production of knowledge from the nursing profession which contributed to an increase of competences and to their expanded role. To improve patients' care and avoid conflicts, and to maximize the benefits to users, professionals need to learn to work together, integrating and respecting roles and competences.