## 2 Literature Review  
Recently, many researchers have analysed various sustainable renovation alternatives. Decision support systems or tools were developed to select the most efficient options (see Table 1). \begin{table}
\begin{tabular}{c c c c} \hline \hline \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Authors** & **Proposed Methods/Systems/Tools** & **Criteria** & **Methods** \\ \hline [PERSON] et al. [17] & A hybrid decision support system to support improvements in energy performance and sustainable renovation of office buildings & Sustainable site, energy efficiency, water efficiency, material and resources, indoor environment quality & A hybrid approach that combines genetic algorithms (GA) with A* graph search algorithm \\ \hline [PERSON] et al. [18] & Decision making in building renovation focused on sustainability & Feasibility, accountability, and functionality & Spider net diagram \\ \hline [PERSON] et al. [19] & Renovation domain model & Energy consumption, energy frames, investment cost, discomfort hours above 27 and 28 (\({}^{\circ}\)C), indoor thermal comfort, indoor air quality, daylight requirements, DF (daylight factor), view-out quality, degree of satisfaction, degree of privacy, health and well-being & Domain Model: a formal (logic-based) domain-specific language, action trees \\ \hline [PERSON] et al. [20] & Decision Support System to assist in the selection of technology based on multiple-criteria ranking: applied to NZEB & Comfort, CO\({}_{2}\) emission reduction, profitability, human health, ecosystem quality, resources consumption & Ranking algorithm \\ \hline [PERSON] and [PERSON] [22] & Decision support system that uses an integral assessment method to evaluate architectural interventions for aging population & Constructive process, economic evaluation, peoples’ demands and technical requirements, social benefits & Giving values between 0 and 100 to renovation measures, \\ \hline [PERSON] and [PERSON] [22] & Progressive BIM approach for the holistic renovation of office buildings with focus on energy & Indoor comfort, energy efficiency, water efficiency, pollution & BIM methodology \\ \hline [PERSON] et al. [23] & A priority identification tool to determine buildings to be retrofitted and actions to be taken (used in social housing context) & Cost and environmental criteria & Multiple-objective optimisation and dynamic building energy simulations \\ \hline [PERSON] [24] & Residential Building Refurbishment Criteria System (RBRCS) & Three domains: engineering management, corporate social responsibility, the protection of environment & Fuzzy logic theory, analytic hierarchy process, fuzzy Delphi method \\ \hline [PERSON] et al. [25] & Method for selecting optimal renovation alternative & Economic, social and ecological criteria & Weighted Sum Method \\ \hline [PERSON] et al. [26] & Supports decisions on renovation actions designed to reduce energy consumption in homes & Environmental, economic, social & ELECTRE III \\ \hline [PERSON] et al. [27] & Sustainable renovation approach to support decision making in early project stages & Environmental and economic & No particular method \\ \hline \hline \end{tabular}
\end{table} 
Table 1: \(Cont.\)The literature review reveals that the available methods and tools for sustainable renovation solutions have different aims. For instance, [PERSON] and [PERSON] [12] published an extensive analysis of indoor air quality and Sick Building Syndrome and proposed a system for decision support in sustainable renovation based on structural equation modelling. [PERSON] et al. [13] proposed a multiple-criteria decision support method for housing renovation to evaluate the economic, environmental, technical and social impacts of various renovation strategies. Some of the tools were designed to ensure energy efficiency or indoor environment comfort. [PERSON] et al. [34], for instance, proposed variational autoencoders to generate whole-building renovation scenarios.