In many countries a large part of the building stock will have to be maintained, renovated, rehabilitated or even removed in the next few decades. Although profitability will be one of the major requirements to be met when these works are carried out, there will be more and more emphasis on the...

Various building rating systems have been developed to assess the 'green' or sustainable performance of buildings. Most systems make use of hierarchical criteria systems to evaluate the buildings with respect to the different aspects of sustainability. Often, these criteria show complex...