Modern management process may be viewed as one constant series of decision making and creation of conditions for effective decision realization. In the process of organizing it is important to verify the organization effectiveness and implement corrections in order to maintain or increase this effectiveness. For the purpose of situation diagnosis and improvement of organization's results, the three-efficiency-levels approach is used (organization level, process level, workstation level). Degree of decision effectiveness (efficiency) will depend on rationality of the problem solving process. Therefore, it is necessary to determine the primary and supporting goals as well as strategies for their realization and to take care of the quality of organization's internal activities, which includes full readiness for cooperation and flexibility towards changes.