requirements, the methods for delivering the required performance, and the methods for verifying that
the required performance has been achieved.
The main purposes of generic hierarchical model are to provide a common platform for defining the
desired qualities of a building and to develop a common language for different disciplines, as well as to
serve as a basis for the development of design and technical solutions. The choice of the objectives in
the hierarchical presentation also shows, to some extent, the values of the developer.
Based on the hierarchy of performance objectives and their targeted qualities, alternate design and
technical solutions can be developed. The capability of different solutions to fulfil the performance
criteria can be studied with verification methods. Figure 1 represents a generic model of a building’s
performance analysis. Similar hierarchies are introduced by several organizations