Four alternative strategies are considered for the requalification of the district, which
combine different building envelope improvements with specific energy efficiency
measures.
4.4.2 MCDA Method
The evaluation of the alternative strategies has been developed by means of the
PROMETHEE (Preference Ranking Organization Method for Enrichment Evaluations) method, which is one of the most known MCDA methods drawn up by Brans
(1982) and subsequently extended by Brans et al. (1984, 1986) and Vincke and
Brans (1985). PROMETHEE is a non-parametric outranking method for a finite set
of alternative actions to be ranked on the basis of different criteria, which are often
conflicting. Each alternative is valued by a positive or negative preference flow
through a value outranking relation, in order to determine how much an alternative is
outranked compared to the others.
A family of qualitative/quantitative criteria has been defined for the evaluation of
the alternative requalification strategies, including not-renewable energy consumption, environmental emissions production, global cost of the operation, indoor
comfort for the inhabitants, green jobs creation and real estate market value increase.
Following the PROMETHEE methodology, a preference function has been defined
for each criterion which allows to establish how much an alternative is preferred over
another. The second type of information which characterizes the evaluation model
regards the preference weights assumed by the decision-makers about a specific
criterion, to determine the relative importance of one over another. To this purpose,
personal interviews with experts in different fields were carried out through the set of
cards methodology (Figueira and Roy 2002) (Fig. 6.5).
4.4.3 Results and Role Played by the Evaluation
The PROMETHEE result aggregation (Fig. 6.6) indicates that strategy 1 and strategy
2, characterized by biomass energy carrier, are generally preferred over the alternative with fossil fuel carrier by all experts, highlighting the interest for environmental
impacts. Strategy 2, thanks to its higher comfort level, achieves a higher satisfaction
compare to strategy 1. On the other hand, strategy 3 turned out to be the one with the
worse performance according to all experts. The results show the advantages of
using the PROMETHEE method for this particular problem. In particular the
PROMETHEE II complete ranking allows to overcome the problem of the incomparability between actions. This is a very important strength of the method because it
provides the DM with a clear ranking that is useful to base the final decision.
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I. M. Lami et al.
combine different building envelope improvements with specific energy efficiency
measures.
4.4.2 MCDA Method
The evaluation of the alternative strategies has been developed by means of the
PROMETHEE (Preference Ranking Organization Method for Enrichment Evaluations) method, which is one of the most known MCDA methods drawn up by Brans
(1982) and subsequently extended by Brans et al. (1984, 1986) and Vincke and
Brans (1985). PROMETHEE is a non-parametric outranking method for a finite set
of alternative actions to be ranked on the basis of different criteria, which are often
conflicting. Each alternative is valued by a positive or negative preference flow
through a value outranking relation, in order to determine how much an alternative is
outranked compared to the others.
A family of qualitative/quantitative criteria has been defined for the evaluation of
the alternative requalification strategies, including not-renewable energy consumption, environmental emissions production, global cost of the operation, indoor
comfort for the inhabitants, green jobs creation and real estate market value increase.
Following the PROMETHEE methodology, a preference function has been defined
for each criterion which allows to establish how much an alternative is preferred over
another. The second type of information which characterizes the evaluation model
regards the preference weights assumed by the decision-makers about a specific
criterion, to determine the relative importance of one over another. To this purpose,
personal interviews with experts in different fields were carried out through the set of
cards methodology (Figueira and Roy 2002) (Fig. 6.5).
4.4.3 Results and Role Played by the Evaluation
The PROMETHEE result aggregation (Fig. 6.6) indicates that strategy 1 and strategy
2, characterized by biomass energy carrier, are generally preferred over the alternative with fossil fuel carrier by all experts, highlighting the interest for environmental
impacts. Strategy 2, thanks to its higher comfort level, achieves a higher satisfaction
compare to strategy 1. On the other hand, strategy 3 turned out to be the one with the
worse performance according to all experts. The results show the advantages of
using the PROMETHEE method for this particular problem. In particular the
PROMETHEE II complete ranking allows to overcome the problem of the incomparability between actions. This is a very important strength of the method because it
provides the DM with a clear ranking that is useful to base the final decision.
106
I. M. Lami et al.