1. A method of utilizing the definition of a first object modeled by means of a computer program for computer-aided modeling, the method comprising: defining, by means of the computer program for computer-aided modeling, a set of definitions of a first situation, the set of definitions indicating explicitly or inexplicitly at least one definition amongst definitions of the first object that represents a real world article modeled by using the computer program for computer-aided modeling, the at least one definition of the first object relating to the first situation and being defined by means of the computer program; defining, by means of the computer program for computer-aided modeling, a set of similarity conditions comprising at least one similarity condition defining upon a situation being similar enough with the first situation; searching, by the computer program for computer-aided modeling from a memory, for a second object in a situation fulfilling the set of similarity conditions, the second object representing another real world article modeled by using the computer program for computer-aided modeling; finding, by the computer program for computer-aided modeling, at least one second object in a situation fulfilling the set of similarity conditions; applying, by the computer program for computer-aided modeling, the set of definitions, of the first situation to create a corresponding set of definitions to the at least one second object in the situation fulfilling the set of similarity conditions; and removing one or more conditions from the set of similarity conditions in response to the fact that a predetermined number of second objects fulfilling the set of similarity conditions were not found.