Purpose -The aim of the paper is to assess an urban transformation project in Italy, from a sustainability point of view. Taking into consideration alternative solutions for the project (zero option, initial project and final project), the paper highlights the most important elements for the sustainability evaluation and the best solution for the transformation. Design/methodology/approach -The sustainability assessment of the transformation project is performed using a particular multicriteria analysis, the analytic network process (ANP). Multi-criteria techniques provide a useful support when a choice must be made among several alternatives with different objectives and criteria and also allow one to include tangible and intangible factors in the evaluation. The ANP is used to derive relative priority scales of absolute numbers from individual judgments and it offers a general framework to deal with complex decisions which provides a comparison of the different options. Findings -The priority list of the alternatives gives a great deal of importance to the final project, with respect to the other possibilities. With reference to the most relevant criteria for the sustainability of the project, the problems related to energy efficiency, the aspects concerning the landmark and the new services for the inhabitants were given the most importance. Practical implications -The procedure described in the paper is suitable for dealing with the complexity of the problem, in a transparent way, taking into consideration the multiplicity of the aspects involved and the presence of several stakeholders in the decision-making process. Originality/value -This study is one of the first examples of the application of the ANP to the field of urban transformation at an international level.
PurposeThe cost-optimal analysis is not able to address the multi-dimensionality of the decision according to the new European objectives and International sustainable development goals in the field of the nearly-zero energy building (NZEB) design. The purpose of this paper is to study the role of multi-criteria decision analysis (MCDA) for guiding energy investment decisions.Design/methodology/approachThe paper explores the Preference ranking organization method for enrichment of evaluations II (PROMETHEE II) application to support the project of transforming a rural building into a NZEB. The evaluation provides an estimate of the effects of alternative energy efficiency measures, involving energy consumption, life cycle costs, carbon emissions, property value and indoor comfort criteria. The study performs a multi-actors analysis in order to understand how different consumers' point of views can influence the final choice of the best investment. Furthermore, a multi-site analysis explores the spatial variation of NZEB building appreciation in the real estate market.FindingsThe PROMETHEE II-based model ranks 16 alternative solutions for the NZEB according to energy, economic and extra-economic criteria. The multi-actors analysis highlights the configuration of the NZEB building that best meets the needs of different end-users, respecting the European directives and national standards. The multi-site analysis concludes that location does not change users' appreciation and not influence the output for the best solution.Originality/valueThe MCDA occurs as a support tool that helps to optimize the preliminary design phase of NZEB through the exploration of the optimal solution considering crucial criteria in the energy and environmental and real estate market rules.
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