Building assessment tools are basically multi-criteria analysis methods. Their goal is to assign a concise score to a building’s overall performance starting from a set of criteria (assessment entries) that deal with environmental, social and economic issues. The score is computed combining the value of indicators through a normalization and aggregation process.
The assessment procedure is articulated in three main steps:
- characterization: building performances are quantified through indicators with regard to each criterion;
- normalization: indicator values are dimensioned and rescaled in a score;
- aggregation: normalized scores are combined to produce a final concise score.
Functional equivalent of a building
The results of assessment of buildings at any life cycle stage have to be compared only on the base of their functional equivalency. The functional equivalent of a building should be referred to (based on EN 15643-1):
- required functions: type and use
- area / volume
- pattern of use (e.g. occupancy)
- location of the building
- required service life
Differences in the assessment of building and neighbourhood performance
In each country/region the assessment of building and neighbourhood performance is different. The various differences appear in:
- levels/ambitions for the building/neighbourhood performance,
- overseeing organisations,
- assessment methodologies,
- tendering products and procedures,
- costs structures,
- and more.