The requirement approach and the art's rule

The present study reports advancements and results obtained from the application of the requirement approach in the reading of the Building System as teaching method as well as testing of the technological planning. It is to be shown that theoretical understanding of this methodology may shape the art’s rule. In order to satisfy the user’s requirements and to tackle the complexity of ensuing topics, it is necessary to consider the building as a complex system that can be analyzed in different ways, coordinated by the same method, depending upon aims to be attained.