3.1. Quantitative Characterization
A total of 37 articles were analyzed, all of which were in English. When examining the articles that specifically focus on the BRIC method and the DROP model as the theoretical foundation and operationalization of indicators, 12 articles were deemed sufficiently relevant for analysis. For the period starting from 2010, there is no dominant country from which the first authors of the articles originated. It is noteworthy that five papers deal with a specific region and the application or adaptation of the BRIC model, while seven papers either cover an entire country or address the topic in a general sense without a specific territorial application of the model. Regarding Europe, four papers are from that continent (another paper, which does not explicitly reference the BRIC method but pertains to a European country, was found but excluded from consideration).
Considering the timeline of publication and the fact that the model was created in 2010, it is evident that the number of papers has significantly increased since 2019, with a total of nine papers published since then. In terms of the type of disaster addressed in the articles, half of the papers (six) focus exclusively on natural disasters, while the other half takes a multidimensional approach, addressing all types of disasters.
When the type of research is considered, three papers are purely theoretical, while the other nine are based on practical, empirical research. Regarding research design, of the 12 articles, one uses a qualitative approach, one uses a quantitative approach, and ten apply a multimethod research design. This is due to the complexity and diversity of the data that must be collected and analyzed in the process of evaluating numerous indicators, which require an appropriate multimethod approach to provide an integrated analytical process.
Another characteristic of the papers examining the BRIC method is that publicly available data, gathered by relevant government institutions, were predominantly used, with secondary data analysis being conducted. Due to this, many of the research papers highlighted the issue of missing data in certain segments and proposed ways to address such gaps to ensure the relevance of the results.
In summary, eight of the papers used publicly available data with a segmented content analysis of existing studies in the field. Four papers employed interviews, focusing on the Delphi technique and the involvement of experts in the research.
Table 3 provides an overview of the results obtained from the analysis of papers related to the BRIC method, which also includes the consideration of the DROP theoretical model.
When examining articles related to resilience indicators in general, specifically their analysis, evaluation, adaptation, and overall successful application, 25 papers were analyzed. Of this number, it is noteworthy that the first author in 10 papers was from the USA during the observation period starting from 2010. Additionally, when considering the publication dates, the distribution is fairly even across the years, with two to three papers published in each observed year. Eight papers focus on specific geographic regions, while 17 papers address entire countries or the topic in a general sense without specific territorial application of the resilience index. Regarding Europe, six papers originate from that continent.
In terms of research type, it is characteristic that the majority—18 papers—take a theoretical approach, while seven papers focus on empirical research.
Regarding research design, of the 25 papers, nearly half (12) employ a qualitative approach, four use a quantitative approach, and nine apply a multimethod research design. A key characteristic of this group of papers is that the dominant approach to data collection is content analysis, which correlates with the qualitative research design and the subject matter of the papers. A total of 11 papers dealt with content analysis.
The next data collection method is the processing of publicly available data from relevant state institutions, which was used in eight papers. Four papers employed interviews and questionnaires as part of their research process. Among these, the Delphi method was used three times (in one paper, it was combined with the analysis of publicly available data). In two papers, the methodology was based on questionnaires and field research.
Table 4 provides an overview of the results obtained from the analysis of papers related to resilience indicators and their application and adaptation.
Summarizing the quantitative characterization of the analyzed papers, within the context of the literature review, the predominant use of the Delphi technique stands out as the most significant finding. Additionally, in papers focused on practical research, data sources primarily came from secondary analysis of public institution data, supplemented in part by questionnaires and fieldwork. This is particularly evident in papers dealing with the application and adaptation of both the BRIC method and other methods or indices used to measure resilience to natural disasters.
3.2. Qualitative Characterization of Resilience Indicators
Summarizing the challenges related to the indicators used to measure community resilience to natural disasters, their application, adaptation across various models, and the implementation and adaptation of the BRIC method derived from the theoretical DROP approach, several conclusions can be drawn.
The indicators discussed in the papers can be categorized into eight groups. Using a generalized translation from English, these are socio-demographic, community well-being, economic status, institutions, infrastructure, geographic and spatial characteristics, cooperation, and risk analysis. These groups of indicators may vary slightly in names across different studies, but essentially, they refer to the same or similar indicators within the group that are related to the context of the indicator group’s name.
As the basis for the consideration, selection, and use of indicators, in most cases, the Handbook on Constructing Composite Indicators: Methodology and User Guide by the Organisation for Economic Co-operation and Development (OECD) was used (Handbook on constructing composite indicators: Methodology and user guide, 2008).
Among the socio-demographic indicators, those that help determine the resilience of modern urban communities are the most numerous. Together with economic characteristics, social indicators assist in assessing the long-term capabilities of a local community (Ji, Wei, Shohet, & Xiong, 2021). These indicators describe the demographic characteristics that point to the ability of the local population to cope with unwanted events and occurrences (Scherzer, Lujala, & Rød, 2019).
The most important indicators in this group include age (percentage share of a defined age range), gender, vulnerable segments of the population (those particularly at risk in the event of a disaster), the share of women in the available workforce, population density in urban communities, the average number of people per household, the demographic dependency ratio, and educational status. These indicators can be generalized and measured for each household. It is assumed that communities with a majority of employed individuals can help themselves during disasters and even assist others, compared to minors and the elderly. The awareness of the employed segment of the community regarding the resilience of the local community can significantly positively affect their behaviour and preparedness for any type of disaster (Scherzer et al., 2019).
Furthermore, as an example, acquiring knowledge mostly occurs through formal education, where skills, knowledge, and competencies are gained, influencing the population’s adaptive capacity to respond adequately to disasters. Local communities with a higher percentage of individuals with limited education increase the vulnerability of such communities due to their unwillingness to take timely actions, measures, and steps. Better-educated individuals return to normal life faster after disasters because they respond adequately and have access to better social and economic resources after disasters (Muttarak & Lutz, 2014). In summary, the most important and widely used indicators and their variables for this group include: age; gender; the degree and characteristics of the so-called vulnerable population; workforce and the share of women in it; population density; the number of people per household; the percentage of the non-working population; and educational status.
Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, the difference is that indicators related to social cohesion have not been developed, religious organizations are placed in another group of indicators, while social and value indicators have developed. Concerning the BRIC model published in 2010, it is concluded that it includes indicators that were not addressed in the relevant scientific papers, specifically indicators such as access to transportation, language competencies, and communication capacities. Community well-being, as the next group of indicators with its variables, significantly impacts overall community resilience because it subsequently affects all other groups of indicators when it comes to disaster resilience. According to research, it has been established that local communities with adequate resources can establish and implement strategies to mitigate the effects of disasters, while impoverished communities evidently lack the resources and the ability to equip themselves before any disaster (Bergstrand, Mayer, Brumback, & Zhang, 2015).
The development of local communities contributes to a higher degree of communication among its members through existing organizations and activities. This connection facilitates easier and better management before and during disasters, which increases community resilience (Mohamad, Jusoh, & Kassim, 2019). In this segment, the religious component is of certain importance due to its connection to the obligation to help others and to be prepared for something inevitable, such as natural disasters. The influence of religious organizations affects the preparedness of urban communities, where those with a high percentage of individuals with rooted belief systems maintain a high level of disaster resilience and promote ways to protect against destabilizing events (Kim & Marcouiller, 2018).
The most important and widely used indicators with their variables for this group include: community awareness of natural disasters; communication systems and information transmission; the ability to use previous experiences; the capacity to monitor potential risks; associations, communities, and groups formed by local authorities; religious beliefs; and prevention plans. Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that, compared to the DROP model published in 2008, the difference is that no indicators related to the absence of psychopathological states were developed. Compared to the BRIC model published in 2010, it is concluded that it includes indicators not addressed in the relevant scientific papers, specifically indicators such as migration or population fluctuation and the percentage of the population engaged in creative and innovative activities. The economic condition, as the next group of indicators with its variables, is used to assess the resilience of individuals, families, and the community as a whole (Mohamad et al., 2019).
These indicators can be measured at the household level to provide a cumulative overview of the overall level of economic resilience. Indicators reflect the functioning of the economy during disasters, particularly for large and small firms. The general vitality of urban economies is reflected in employment rates, income, retail turnover, supply chains, and other aspects (Scherzer et al., 2019). The category of economic resilience encompasses both the static assessment of the current economy of the community (economic activity) and the dynamic assessment of the community’s ability to continuously maintain economic growth (economic development) (Irwin, Schardong, Simonovic, & Nirupama, 2016).
The most important and widely used indicators with their variables for this group include: financial resources for disaster response, employment rates, household income levels, the percentage of the poor, and the characteristics and level of insurance coverage (from health insurance to all other types). Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, all indicators in this group have been developed. Compared to the BRIC model published in 2010, it is concluded that it includes indicators that were not addressed in the relevant scientific papers, specifically indicators such as the GINI coefficient, the percentage of the population employed in the food industry, and the distribution and share of companies by size. The share of women in the total employed population, unlike the BRIC model, is treated as a socio-demographic indicator. Institutions - The indicators of urban community resilience with their variables within this category reflect community and crisis management. It is widely accepted that resilience is not an isolated characteristic or feature of institutions but a product or function of comprehensive institutional performance. It arises from institutional efficiency (or the ability to achieve and improve outcomes over time). This, in turn, creates trust, legitimacy, and credibility, which themselves represent sources of resilience that further strengthen institutional capabilities. It is believed that people who work in public institutions and hold higher positions of power influence the disaster response. They attract political support and economic resources for recovery (Scherzer et al., 2019).
Furthermore, the studies show that communities located near the centres of political and economic power often benefit from resources intended for disaster mitigation (Cutter, Ash, & Emrich, 2014). The most important and widely used indicators with their variables for this group include the availability of public and emergency services; civil protection programs; cooperation between the public and private sectors; regulations and guidelines for disasters; the existence of organized disaster response units; continuous public disaster preparedness; disaster response plans; evacuation plans; community crisis operation plans; adequate spatial planning; and the percentage of the employed population in local institutions. Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, all indicators in this group have been developed, and new indicators and variables have been introduced. This significantly increased the quality of institutional resilience within local communities. Compared to the BRIC model published in 2010, it is concluded that it includes indicators that were not addressed in the relevant scientific papers, specifically indicators such as flood risk in the community, emergency services funding, and political micro-community fragmentation. It is noticeable that more precise indicators with their variables have been developed, allowing for a more comprehensive understanding of institutional resilience in local communities than in the original BRIC model. Infrastructure, as a group of indicators with its variables, focuses on the resilience of residential units and the local infrastructure used by community members. The quality of materials used in the construction of housing and other communal infrastructure determines the community’s recovery process (Scherzer et al., 2019).
Individuals with high incomes can afford quality housing units compared to those with low incomes, confirming the correlation between groups of indicators and the impact on overall resilience, according to research (Muttarak & Lutz, 2014). There is a direct correlation between the materials and construction processes adopted to make infrastructure and housing units disaster-resistant, which is necessary to achieve community resilience in infrastructure terms (Karanci, Ikize, Doğulu, & Özceylan-Aubrecht, 2016).
The most important and widely used indicators with their variables for this group include the share of areas covered by alert systems, building resilience assessments, building age, materials and construction quality, and maintenance of existing infrastructure. Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, the indicators are more developed and refined, and transportation infrastructure is included under the overall infrastructure without specific segmentation. Compared to the BRIC model published in 2010, it is concluded that it includes indicators that were not addressed in the relevant scientific papers, specifically indicators such as the share of mobile homes in the total number of units, the share of vacant properties, the number of hospital beds per 10,000 people, road network density, precise building age, the number of accommodation establishments per square mile, and the number of educational institutions (for shelter) per square mile. Geographical and spatial characteristics determine the resilience of local communities to natural disasters. Geographical diversity presents an additional challenge in assessing resilience. For example, coastal communities face risks that inland communities do not, such as hurricane storm surges and tsunamis, while only communities in seismic hazard zones need to improve earthquake resilience. Preparing for a flood or hurricane requires a different approach than preparing for an earthquake or tsunami. This reveals a limitation in the scalability of resilience metrics with different hazards and communities of varying sizes, locations, and characteristics (Johansen, Horney, & Tien, 2017). Resilience considerations require accounting for the interaction between the spatial and temporal scales of a community, including how people integrate with space and how those spaces shape behaviors, thoughts, and feelings within communities, thus building their resilience over time as they inhabit a particular area (Quigley, Blair, & Davison, 2018).
The most important and widely used indicators with their variables for this group include: the geographical location of the community, the spatial composition of the community, and the use of parts of the community’s location. Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, this group of indices with variations is dispersed and not included as such. It is partially distributed across the environmental and institutional index groups. It is also important to note that it is not as clearly defined as it is in current studies.
Compared to the BRIC model published in 2010, it is concluded that this group of indicators does not exist. There are some indices with specific variations in infrastructure resilience and community resilience that may be similar to this group of indicators, particularly in terms of the distribution of public institutions. Collaboration involves a broad spectrum of connections between individuals, organizations, institutions, and government authorities into a unified network that allows for continuous two-way communication and mutual influence in decision-making crucial to community resilience in the event of a disaster. “Communities have the authority to make decisions that allow for planning, financing, and implementing resilience measures, and they can act as logical intermediaries for collaboration with private property owners and utility services. Communities provide a range of services to meet social needs, supported by the built environment. The performance of these systems is integrated, though they are often designed and constructed independently of each other.
The resilience of individual buildings, facilities, and infrastructure systems should be defined in terms of the roles and functions they perform within the community. The resilience of the built environment should be evaluated as a system of systems with dependencies that can affect other systems and the entire community” (McAllister, 2015, p. 4). The most important and widely used indicators with their variables for this group include collaboration between local communities and higher authorities in decision-making and procedure implementation, comprehensive collaboration and networking at the local level, and community involvement in disaster management. Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, this group of indices with variations is more developed. In that model, social networking and its rootedness in the community are mentioned under the group of social indicators.
Compared to the BRIC model published in 2010, it is concluded that this group of indicators does not exist. There is a communication capacity index in the group of social resilience indices, which only considers the proportion of the population with a telephone, a much narrower approach compared to the examined indices and their variations, which consider a much broader spectrum of communication establishment and maintenance methods. Risk analysis represents a proactive group of indicators aimed at identifying potentially vulnerable points within a community, where, in the event of a disaster, the least resilience would be mapped. The indicators of urban community resilience in this category include the availability of risk and vulnerability databases for communities, historical records of previous hazardous events, a database of the current number of people exposed to risks, a community risk assessment, the presence of disaster risk mapping associated with natural threats, and early warning response programs. Archiving data on previous disruptive events improves the learning experience for community resilience. Archived data on disruptive events represent a resilience indicator where historical data on disasters that have occurred in communities can be accumulated. This indicator represents the ability of communities to predict based on archived disaster data. Geographic Information Systems (GIS) are useful tools for governments, insurance companies, and other institutions to formulate disaster prevention strategies and implement early warning mechanisms (Macharia et al., 2020).
Advanced simulation techniques for scenario analysis can be used to identify and assess the impact of disasters. The goal of scenario analysis is to enable the generation of “surprising” threats or disruptive events that can provide valuable insights into how to make critical infrastructure resilient (Zio, 2016). The most important and widely used indicators with their variables for this group include: disaster risk databases; hazard assessments for the community; risk mapping; a database of the number of people potentially exposed to risks. Correlating these indicators with those listed in the works that established the BRIC and DROP models, it can be concluded that compared to the DROP model published in 2008, this group of indices with variations is also more developed. In the mentioned model, in the group of institutional indicators, segments can be found that represent indicators similar to those representing risk analysis. Compared to the BRIC model published in 2010, it is concluded that this group of indicators does not exist. There are several indices in the group rounding up institutional resilience, which can partially compensate for the purpose of the group of indices named risk analysis, which was actively used in the analyzed papers.
The sublimation of methodological approaches relates to the use of the previously mentioned groups of indicators and the indicators themselves with their variations. Most, or nearly all, methodological approaches have been developed after 2010 and refer to the use of indices based on the need for which they were created. Methodological approaches have been translated into specific tools or frameworks. The approaches are almost always multidisciplinary and apply to all disasters. A smaller number of tools and frameworks have been developed exclusively for natural disasters and apply to specified areas or regions that face specific natural disaster threats. It is characteristic that fewer than ten tools developed from 2000 to 2010 are mentioned in the papers, while more than 35 tools have been registered from 2010 to 2024, excluding their adaptations, which are not considered new models, although they often significantly differ from the basic, initial model.
Several attempts have been made to measure disaster resilience by developing composite indicators, and these efforts are still in their early stages, as is what might represent a standard mechanism for measuring disaster resilience. The tools have applied various, and even opposing, approaches to fulfill the common goal of providing guidance for building resilient communities. This reflects the diverse origins of the tools, variations in the definition of community across the selected tools, and the diverse and opposing starting points that led to their development. More than half of the tools mentioned in the papers were developed for the needs of local communities in the United States. The initiators of their creation are mostly government institutions, while a certain number of tools were developed under the sponsorship of organizations concerned with environmental protection. Other tools have been developed in other developed countries. As the tools were mainly created in developed countries, there is concern about their applicability and generalizability to communities in less developed countries. Local authorities and community organizations are the main target group. There are also tools designed to inform other sectors, such as academia, aid agencies, and insurance companies.
3.3. The qualitative characterization of the use and modifications of the BRIC method
The DROP model, as the theoretical basis for the BRIC method, was designed to assess resilience to natural hazards, and the authors note that the model could also be applied to other sudden or long-term hazards. In the DROP model, communities are defined as “the totality of interactions of the social system within a defined geographic space, such as a neighbourhood, census district, town, or county” (Cutter et al., 2008, p. 599). BRIC has been applied at different levels and with various geographic units. The levels of analysis have ranged from entire countries to individual villages. Counties were the unit of analysis in the original BRIC study from 2010 and represented the most commonly used definition in subsequent research.
The original BRIC study examined 36 indicators with their variables within five groups of indicators. The number of indicators used in the analyzed studies ranged from 3 to 49. Some studies in the literature have even employed up to 57 indicators.
Table 5 presents the characteristic studies used in this review, along with the specific number of indicators for each group and other relevant details for each study.
Basic research and the establishment of the DROP and BRIC methods by a group of authors, led by Susan Cutter from the University of South Carolina (USA), represent the foundational basis for the consideration and application of these methods. In this context, their 2014 work stands out, in which the BRIC method was applied across the entire United States, and a modification of the BRIC method was carried out, which served as the foundation for further use and modifications (Cutter et al., 2014). In that study, 49 indicators were developed across six groups, instead of the initial 36, aiming to encompass all the specificities for the entire U.S. territory to effectively measure resilience indices. Initially, 61 indicators were included, but after checking and analyzing the correlations, as well as expert review, the number was reduced to the aforementioned 49. This study is important for future approaches in selecting indicators because, in subsequent studies, the selection of indicators was made by experts using various methods (most commonly Delphi), by reviewing relevant literature, applying international organization guidelines, and calculating the correlation between indicators or indicator groups.
In the studies, starting from the first one led by Susan Cutter in 2010, when the BRIC method was established, the OECD guidelines were primarily used for assessing the quality of indicator selection and application. However, although these guidelines served as a foundation, not all recommended methodological steps were applied. In Cutter’s first 2010 study, five OECD guidelines were applied. The author later increased the number of guidelines used in constructing the indicators, reaching up to eight in later studies (Cutter et al., 2014). The distribution of guidelines used in other studies ranges from three to nine. Roughly divided, about 20% of the studies used five, six, or seven guidelines. The guidelines most commonly omitted include: adding missing data, analyzing the reliability and sensitivity of the indicators, revisiting the data and ensuring transparency, and studying the data structure and linking it with other indicators.
The highest number of guidelines followed was in a study where the BRIC method was adapted for Norway. Nine guidelines were applied there, excluding the addition of missing data, where indicators with missing data were removed.
It is characteristic that in only seven studies from the analysis, the Delphi technique was applied, whereby experts from relevant scientific fields for each country or community being researched would determine appropriate indicators to measure the composite resilience index as the final result (Ciccotti, Cassia Rodrigues, Boscov, & Günther, 2020; Cohen, Leykin, Lahad, Goldberg, & Aharonson-Daniel, 2013; Pazhuhan, Moradpour, hesarakizard, & Ayyoob, 2023; Singh-Peterson, Salmon, Goode, & Gallina, 2014b; Talubo, Malenab, Morse, & Saroj, 2023; Tseng, Huang, Li, & Jiang, 2022).
Most of the studies used publicly available data, and simply, where data was not available, the OECD methodology was avoided, and such indicators were excluded without specific reasoning, and no effort was made to supplement the data with other available compatible data, as seen in studies (Aksha & Emrich, 2020; Bixler, Yang, Richter, & Coudert, 2021; Csizovszky, 2023b; Javadpoor et al., 2021; Scherzer et al., 2019; Weaver, 2016).
In some studies, indicators were excluded through the application of statistical methods if they did not provide appropriate results or were not valid indicators of resilience. A particular fact that might point to an inadequate selection of indicators in studies concerning their specific construction is the analysis of content from previously published research, synthesized through the processing of publicly available data. In these studies, by adopting the content of scientific works predominantly published in the USA and developed Western countries, the geographical, social, economic, and infrastructural differences, which are crucial for constructing optimal indicators for each country or community, were not adequately considered. The indicators obtained in this way were further shaped by the available public data, which, in poorer developing countries, are generally scarce and often of questionable value. Additionally, almost all the analyzed studies excluded fieldwork and surveys except for one study (Jepson & Colburn, 2013).
Their application, in situations where concrete publicly available data or a sufficient number of experts for the Delphi method are lacking, could lead to significant data for creating appropriate resilience indicators.
A fact that must be considered is, to a certain extent, the correct selection and use of indicators from each group, especially those related to geographical and social, but also other groups of indicators used to measure the resilience of local communities to natural disasters. The initial objectives of establishing the BRIC method and the theoretical foundation in the DROP model were designed to allow for the “localization” of indicators and their adaptation to the entity for which resilience measurement would be conducted, as done in the following studies for the DROP model (Mavhura et al., 2021; Siebeneck, Arlikatti, & Andrew, 2015).
Furthermore, after conducting a content analysis of the studies, the analysis of community resilience in Norwegian municipalities stands out as a characteristic study (Scherzer et al., 2019). The theoretical foundation was clear, and the authors explicitly stated that it was an adaptation of the BRIC model. The authors claimed that “the community resilience index for Norway should be specific to that country, and the finally selected indicators should be reasonable and justified in the context of Norway” (Scherzer et al., 2019). The starting point in the study was a list of indicators from the original BRIC study. A specificity was that indices for which complete data were not available were excluded from the analysis, unlike other studies that included indices without complete data by using the latest available or any available data (disregarding the time of data collection). Official data from institutions in Norway were used.
Of the initial 139 indicators considered, 27 were immediately excluded due to missing data. A total of 47 indicators grouped into six categories were used, which differed from the original BRIC method by emphasizing the indicator group labeled “Environment” (geographical and spatial characteristics). This number of indicators was reached by excluding indicators that did not provide relevant results or could not determine spatial differences for local communities. Some were excluded because it was assessed that they were not significant for a specific group of indicators. Unlike the original 2010 study, where the BRIC method was established, this study normalized the index values, and then they were assigned different weights based on their importance. Most studies normalized index values from 0 to 1, while a smaller number normalized them with a base value of 0 and a deviation from -1 to 1.
Only a few studies weighted the indices based on their significance, using the procedure developed by Becker as the leading author (Becker, Saisana, Paruolo, & Vandecasteele, 2017). Afterwards, a check of the comprehensiveness of the used indices and the definition of their values was performed. First-order sensitivity indices within groups were used to assess the importance of each indicator within its group. The resulting resilience index was compared with existing indices using Pearson’s correlation coefficient to further exclude some indices, which was done for seven indices. The resilience index results were clearly presented on maps using standard deviation, showing the overall performance of the indices and the indicators they were based on.
Another notable and useful study is one analyzing community resilience in Hungary using the BRIC method (Csizovszky, 2023a). The theoretical foundation was clear, and the author explicitly stated that the study involved the adaptation of the BRIC model, taking into consideration previous studies that had adapted the original method, with the study on Norway serving as one example and foundation. The starting point in the study was a list of indicators from the original BRIC study.
After analyzing the literature, the author decided to use 36 indicators in five groups for Hungary. The model used for Norway and the method of excluding indicators until reaching an optimal number was not applied. Missing data were supplemented in a way that was not considered a key limitation; only the available data were used. Official data from institutions in Hungary were used. As in the study on Norway, index values were normalized from 0 to 1. Afterwards, the comprehensiveness of the used indices was checked. Throughout the process, the indices within groups were frequently adjusted to use relevant indices. All indices that had high or low values for each local community were excluded because they were not considered relevant for drawing conclusions. Unlike the study that adapted the BRIC method for Norway, the correlation was measured using Pearson’s correlation coefficient, the Variance Inflation Factor (VIF), and the Kaiser-Meyer-Olkin (KMO) test, and some indices were excluded based on these tests. The resilience index results were clearly presented on maps using standard deviation, showing the overall performance of the indices and the indicators they were based on.
In addition to the mentioned studies, other useful studies that can be used as guides for research include those related to Nepal and Australia. The study on Nepal (Aksha & Emrich, 2020) due to the country’s specifics, used primarily the theoretical DROP foundation and was not based on adapting the BRIC method. However, due to the quality of the approach, the research provides insight into one of the ways to use characteristic indicators and their variables for measuring community resilience indices. Regarding the research on Australia, it is notable that no modification of the indicators from the original BRIC study was made; rather, the indicator variables were simply adapted to the available statistical data, and the method’s adaptation process was verified through expert interviews.