Rating building asset degradation with efficiency indexes

Aim of this research is to give building process’s stakeholders some Key Performance Indicators to help them in making correct decisions during operation, maintenance and repair phases. Decisions regarding maintenance, upgrading and also transactions are frequently lacking information and this can cause serious problems, like poor performances, expensive and ineffective maintenance and eventually low yield investments. In order to cover this lack, several Building Conditions Assessment procedures have been developed during the last fifty or more years, but these are often inaccurate, unreliable, subjective or too expensive. In order to help decision-makers in their work, a quick but accurate building survey procedure and some KPIs have been developed to gather and re-elaborate data to rate buildings (and their parts). The procedure analyzes both documentation, as an indicator of building ability to fulfill required performances, and degradation. The procedure output is a rating for the whole building, made of two different indexes: documents and technical. First one has been developed starting from a checklist where each technical document is weighted according to its importance. Technical index is made by two different indexes: the first takes into account anomalies and the second considers each component age in relation to its RSL.