A general overview of the procedure structure in the following Figure 9: starting from the data collection of all the building informations (characteristics, needs and constraints),  the second step is the criteria definition. Then, objectives are defined; for each objective, retrofit targets are indicated, which are measurable indicators. For each target the optimal range of measurement - benchmark values - are indicated, with some suggestions of needed analysis and possible references, that could help the decision-maker or professional in the assessment process. Finally, retrofit measures are proposed by the procedure with alternatives, pros and cons and possible no-standard solutions, in the 'references' part.