EN
Rationality is a characteristic of any business activity. However, it still constitutes a ground for never-ending consideration, especially in relation to service economics. It is due to the fact that economic laws, which are applied in the field, are subject to rapid changes. The dilemma is establishing defined regularities that carry the traits of scientific generalizations characteristic of the field of services. They are recurrent relations between particular components of a service process. It is duty of a service decision-maker to establish a system of proceedings, which will ensure relatively full realization of preset goals connected with obtaining utility values out of the services at an every stage of the providing process. The aim of this article is to produce depiction of a rationality problem in a service business activity.