ABSTRACT
This chapter focuses on classification systems used for this second leg the execution of building projects. These systems both concern the processes and the physical elements in construction and can be legal systems, systems developed within the construction business, IT standards for a better controlled building process. However, they all have in common that they are elaborated as attempts to handle the increasing complexity and fragmentation of knowledge in construction by establishing clearer interfaces between a number of stages or a system of physical elements. As mentioned in the introduction to this chapter, the construction sector can no longer draw on the traditional crafts as subsystems together forming a clear and coherent system of knowledge. Furthermore, they have become detached from the architectural conception of the work and its elements. This chapter looks into examples of recent attempts to classify processes and elements of buildings in the construction sector. These examples taken from mostly a Danish/Scandinavian context.
