Barriers to the Development of Smart Cities in Indian Context

Smart city development is gaining considerable recognition in the systematic literature and international policies throughout the world. The study aims to identify the key barriers of smart cities from a review of existing literature and views of experts in this area. This work further makes an attempt on the prioritisation of barriers to recognise the most important barrier category and ranking of specific barriers within the categories to the development of smart cities in India. Through the existing literature, this work explored 31 barriers of smart cities development and divided them into six categories. This research work employed fuzzy Analytic Hierarchy Process (AHP) technique to prioritise the selected barriers. Findings reveal that ‘Governance’ is documented as the most significant category of barriers for smart city development followed by ‘Economic; ‘Technology’; ‘Social’; ‘Environmental’ and ‘Legal and Ethical’. In this work, authors also performed sensitivity analysis to validate the findings of study. This research is useful to the government and policymakers for eradicating the potential interferences in smart city development initiatives in developing countries like India.

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Introduction
Smart city development is gaining considerable recognition in the systematic literature and international policies in the last two decades (Albino et al. 2015;Koo et al. 2017; Mori and Christodoulou 2012). For this work, a smart city can be defined as a technologically advanced and modernised territory with a certain intellectual ability that deals with various social, technical, economic aspects of growth based on smart computing techniques to develop superior infrastructure constituents and services (Bakıcı et al. 2013;Cruz-Jesus et al. 2017;Washburn et al. 2010;Zygiaris 2013;Chatterjee and Kar 2018b). As per the United Nations Population Fund, a large proportion of the population will shift to city regions by 2050 (UNFPA 2008). In India, urbanisation is growing rapidly and cities are likely to expand to 600 million by 2030. Another study by Mckinsey (2018) reported that in the following 15 years, around 200 million people will transition from rural to urban areas in India. The change will be enormous, nearly equal to existing populations of France, Germany, and the United Kingdom combined. In this sense, the Government of India (GoI) is committed to enhance the quality of life for citizens through its urban development agenda (Bloomberg Philanthropies 2017;Nair 2017). In light of this, GoI has listed 109 of India's most popular urban centres where the focus shifts from Bhighways to i-ways^.
The urban population of India is growing at a lesser rate when compared to the global average (31.15% as per the 2011 census of India). The reason for this may be a lack of governmental supportive polices or challenges in managing the urban dynamics. On the other hand, countries such Chile, Mexico, Argentina, Brazil and China have responded by launching various timely initiatives to manage urbanization efficiently (Aijaz 2016). For example, Santiago de Chile has shown advancements on becoming smarter (Fast Company 2013). Similarly, the Chinese city Xinxiang pursued a joint programme with IBM to improve its transportation network and community safety (China Daily 2013). In citizens' quality of life index, countries such as Denmark, Switzerland and Australia are out performing Asian countries including India. For improving the quality of life, policymakers conducted an initiative of smart city development in India (OCED 2015; The Indian Express 2016). However, cities in developing countries like India are extremely different to design and implement.
Cities generate new kinds of physical problems such as scarcity of resources, air pollution, difficulty in waste management, traffic congestions, and inadequate, deteriorating and aging infrastructures etc. . Another set of challenges arise from the massive levels of digitization and generation of data (Chauhan et al. 2016). In recent years, a sequence of challenges in the cities' economies and needs has arisen, administering the promotion of the smart city idea. In addition, the literature also lacks a clear understanding of strategic planning for smart city projects (Angelidou 2015). There is a clear literature gap pertaining to the smart city agenda, including its theoretical development and evaluation of related challenges that facilitate implementation in a country context (Yigitcanlar 2015). Therefore, key barriers to the smart cities' development need to be identified and evaluated.
To help policymakers, in this work, the key barriers to the smart cities' development are identified from an evaluation of the literature and experts' feedback. Different experts might have diverse opinions regarding the barriers to the smart cities' development in India. Therefore, the experts on smart cities with regard to academia, industry and public-sector organisations were included to provide their views on the various barriers that may influence the way in which smart cities develop. Specifically, this research sets the following objectives: [i] Identification of relevant barriers of smart cities development in India, [ii] Prioritisation of barriers to recognise the most important barriers of smart cities development in India. The selection of barriers was made through literature and inputs received from experts. Prioritizing the barriers is a decision problem involving various criteria and sub-criteria. Various difficulties supplement the prioritization of barriers due to human involvement and indistinctness in data . To remove the essential imprecision and ambiguity, this work uses the fuzzy set theory (Zadeh 1965). In this work, authors selected the fuzzy AHP (Analytic Hierarchy Approach) due to this technique's ability to determine the importance of the identified barriers under fuzzy surroundings (Govindan et al. 2015). The fuzzy AHP permits mixing fuzzy set theory with the AHP technique to capture the human bias in judgements when developing pairwise comparisons between barriers.
The remaining sections of the paper are structured as follows: Section 2 presents the related literature on smart cities and highlights the barriers of smart cities development. Section 3 discusses the solution methodology along with the research framework. Section 4 illustrates the data analysis and results. Section 5 presents the sensitivity analysis to examine the priority rank stability. Section 6 discusses the results and presents the theoretical contributions and implications for practice. Finally, Section 8 provides conclusions, limitations and directions of future research.

Literature Review
This section illustrates the literature linked to smart cities, and identifies the barriers related to smart cities development.

Smart Cities Development
The concept of smart city was first addressed in 1990s with an aim to centre the implications of information communication technology for superior infrastructures and upgradations in networks. The widespread use of information technologies also enables cities to empower the advancement of indispensable services for safety, health, governance and delivery (Hernández-Muñoz et al. 2011;Pereira et al. 2017). For assisting policymakers on smart city network design, the California Institute for Smart Communities explored ways of transforming a city into smart city along with the extent of utilisation of information technologies in smart city context (Alawadhi et al. 2012;Albino et al. 2015). As a highly significant and extremely sensible initiative, the European Commission started plans on smart cities in 2010 that underpin four dimensions for the cities including construction, heating and cooling systems, power and transportation. The objective related to transportation, for example, is to build an intelligent public conveyance and traffic management system that avoids congestion, helps reduce fuel consumption and supports safety measures (Djahel et al. 2013).
The latest GSMA report also recommends that transportation, such as intelligent transportation and traffic information systems, play important role in smart cities projects . Digital services also play a critical role in facilitating information and services access to the residents of smart cities (Chatterjee et al. 2018;Chatterjee and Kar 2018a). The European Commission has also endorsed Bthe smart cityĉ alls to improve energy efficiency and green mobility for the community (Lazaroiu and Roscia 2012). Lee et al. (2013) suggested six key dimensions for the concept of smart city, in terms of economy, mobility, environment, people, living and governance. As of 2012, there were approximately 143 smart cities projects, out of which 35 projects in North America and 47 projects in Europe were seeking to adopt smart technologies in managing urban issues. These included traffic congestions, energy requirements, higher resources etc. . According to a pan-European research project -Intel Cities (2009), effective governance is key to smart city development (Paskaleva 2011). A review of diverse definitions and practices of smart cities across the world also indicates that most of these territories include widespread use of mobile infrastructure and services . In respect of an increasing urban population and improved service quality in India, researchers and policymakers should acquire a greater/a more informed understanding on smart city development and its relevant barriers.

Barriers of Smart Cities Development
Based on previous studies, this work listed 31 key barriers to smart city development.. Furthermore, in consultation with experts, this work then categorised the barriers into six key categories; details of data collection is provided in Section 4. The various categories and associated barriers are presented in Table 1.

Research Methodology
This work used fuzzy AHP as the research method. This approach allows factors/variables/phenomena to be weighted in terms of importance, in this case smart cities and their related barriers as well as the categories of barriers. First introduced in 1980 by Thomas L Saaty, AHP is a decision-making tool, which assists in developing a hierarchical structure of variables (Saaty 1980;Luthra et al. 2013;Luthra et al. 2016b). AHP/Fuzzy AHP is arguably superior to other decision analysis methods such as fuzzy TOPSIS/TOPSIS, fuzzy ANP/ ANP, and ELECTRE and due to their limited acceptability and complexity (Harputlugil et al. 2011;Mangla et al. 2017). AHP is accessible to use and produces robust results for managers. AHP highlights the alternative, which best accords to achieve the defined goal and understanding of the problem. A human presence can lead to subjectivity in the analysis, however, the application of AHP limits such biases . AHP provides the numerical priorities for each variable to attain the goal (Ordoobadi 2010). However, AHP has its own limitations, described as (Ishizaka and Labib 2009;Mangla et al. 2016): i. Problem of rank reversal or changes in priority due to any changes in factors or alternatives ii. The hypothesis of factors independence iii. Human bias and subjectivity in their judgments in forming pair-wise comparisons iv. Consensus measure, if context is same and a group of experts has divergent priorities To deal with above problems, AHP techniques can be extended to modified AHP -Bayesian approach, Fuzzy AHP, and Grey AHP Kar 2015;Sahoo et al. 2016). Amonst these, fuzzy AHP is preferential, due to its simplicity and higher consistency (Junior et al. 2014;Prakash and Barua 2015). The Fuzzy AHP technique also allows (i) analysing the behaviour of complex system in decision-making; (ii) evaluating the human judgment by determining the relative importance of system variables. Therefore, this research proposes to use a fuzzy based AHP approach for prioritizing the barriers in smart city development in India. The flow map for the fuzzy based AHP technique is shown in Fig. 1, and the steps involved are explained as follows: The fuzzy AHP involved several steps (Chan et al., 2008) as follows: Step 1: Formulating and defining the aim of research work: The aim of work to prioritize the barriers in smart cities development is defined.
Step 2: Applying the fuzzy concepts: In a decision-making problem generally involves human assessments consist of qualitative judgments. Thereby, the fuzzy concepts are preferred (Dubois and Prade 1979;Zadeh 1965). The triangular fuzzy number (TFN) is used in this work.
Step 3: Constructing a hierarchical structure: In respect to the aim of this work, a hierarchical structural keeping the experts' view into account is formed.
Step 4: Developing a fuzzy pair wise assessment matrix: The pair wise assessment matrix for the barriers are formed. Prior to this, a nine-point scale of relative importance based on TFNs is designed (Table 2). Experts generally provide their feedback in terms of linguistic statements thus fuzzy scores were used to transform their linguistic inputs into numbers.
In order to develop a positive fuzzy comparison matrix (M), the average of the pair wise comparisons from expert panel is computed, which is given as M = [m uv ] n × m .
Where, m xy shows the fuzzy entries in the developed fuzzy positive matrix, i.e., (i uv , j uv , k uv ). Further, positive fuzzy numbers should also satisfy the properties, given as below: i uv ¼ 1 i uv ; j uv ¼ 1 i uv ; k uv ¼ 1 i uv , where, u and v = 1, 2 ………………z, i.e., no. of criteria. Increasing volatility and uncertainty in the global economy could be a major concern for the smart cities development Ferrara (2015) 11 Higher operational and maintenance cost (ECO5) High cost of IT, professionals and consultancies, installation, operation and maintenance and training are concerns for the smart cities development   (2015) 18 Privacy and security issues (TECH3) Issues related to privacy and security (e.g. threats from hackers and viruses, low privacy, high costs etc.) tend to be a major concern for smart cities development There is a lack of specific data and corresponding scalable methods in smart city development agenda Gluhak (2017) Environmental (ENV) 22 Lacking ecological view in behaviour (ENV1) Lack of ecological view in pro-environmental behaviour toward consuming energy Kogan and Lee (2014) 23 Growing population problems (ENV2) Rapidly increasing population could be a concern for the smart cities development Neirotti et al. (2014)  Open data and its accessibility is an issue in the smart cities, which Kogan and Lee (2014) Step 5: Devising barriers significance weights: The fuzzy assessment matrix is further evaluated using Chang's Extent Analysis method (Chang 1996;Luthra et al. 2015;. This helps in determining the significance weights of barriers. The detail for Chang's Extent Analysis method is given in Appendix 1. A conceptual framework for analysing the identified inhibitors relevant to smart city development is proposed (see Fig. 2). The framework is developed by following the guidelines of Platts and Gregory (1990) and given as below: i. Involved processes are strictly relevant to existing framework. Analysis of the literature, selection of barriers and research methodology applicability all are associated with the research aim.
ii. Involved processes of the framework are well supported by literature and thereafter verified through experts' feedback. The conceptual research framework consists of two phases. In Phase 1, this work seeks to select the most suitable barriers to smart city development in Indian context. The selection of the most suitable barriers is grounded on literature survey and feedback received from the experts'. In Phase 2, we seek to explore the relative importance of the listed most suitable barriers and the categories of barriers. To achieve this, fuzzy based AHP approach is used (see Section 5.3). However, the suggested framework is not tested empirically at this stage of this work.
The conceptual framework depicts a real-life illustration of the issues of smart city development in India perspective as presented in Section 4. However, questionnaire and data collection is demonstrated in the next sub-section.

Questionnaire Development and Data Collection
A total of 31 barriers attributed to six categories to smart cities development were identified from the extensive literature review. This work has been conducted in an Indian case context (single case study type). The case study approach is significant to the theoretical development of the domain (smart city  Between y and z times more important y, (y + z)/2, z Between y and z times less important 1/z, 2/(y + z), 1/y The values of x range from 2, 3…9, whereas the values of y and z can be 1, 2…9 with y < z agenda). The case study research can also reveal the cognitive behaviour of a system, and thus underpins the empirical research in the domain (Voss et al. 2002). Due to the insufficiency in theory and expertise on smart city, this work prefers to discourse smart city development using expert's opinions . Initially, twenty experts linked to smart cities project were contacted by phone, emails and direct visits to explain the purpose of the research. The selection of experts was dependent on the basis of researchers' convenience, cardinal consensus and personal contacts. Eight out of twenty experts felt they were able to participate in this research. This is considered as a satisfactory size for the present case based research (Lin 2013;Luthra et al. 2016a) provided that experts selected represent an intensive understanding of smart city development projects in Indian context. To examine the barriers to smart cities development in Indian context, we conducted a one-day workshop on BSmart City Design^on March 7, 2017 in New Delhi, India. The experts were highly skilled professionals from finance and operations, project management skills, ministry level professionals, environment management, and decision analysts.
Overall, this work can be applied to a limited context conducted with a comparable sample size (8 experts) but confirms a basis for further research that could be generalised to larger populations. For further clarity on the expert's background, the demographic summary of experts with various criteria is provided in the Table 3.

Data Analysis and Results
Fuzzy AHP is utilized to find the dominant barriers to smart city development in Indian context. Data analysis and related results have been provided. The proposed framework is applied to the research problem under study with other details as below: To validate these literature based barriers, a Delphi group session/consultation was conducted with the consent of experts. The experts were asked to rate the listed barriers in smart city adoption on 5-point Likert scale (1 = not at all and 5 = very significant) through a questionnaire shown in Appendix-A. The mean scores of barriers and their standard deviations to smart cities development in the Indian context are also identified as given in Table 4.
The barriers with rating of 2 or mean value less than 2 were decided to be deleted. From Table 4, no barrier has obtained mean value less than 2, so as no barrier was deleted from the list. The experts were also asked to make any modification in the list of barriers; however, all the experts were agreed on the 31 literature-based barriers. In this way, all the identified 31 barriers were validated.
In this phase, the previously identified thirty-one barriers were presented to experts for developing appropriate categories of barriers. The experts suggested evaluating 31 barriers to smart city development in the context of a developing economy like India through PESTEL analysis. However, the government has a vital role in initiating and executing smart city

Hierarchical Structure
A hierarchical structure for this research is developed using expert inputs. The developed decision hierarchy contains of three distinct levels, given as, prioritizing the barriers to smart city development (at Level-1), six categories of barriers (at Level-2) and thirty-one smart city redevelopment related barriers (at Level-3) (see Fig. 3).

Formation of the Fuzzy Pair Wise Assessment Matrix
Pair wise assessments are formed for barriers by using experts' inputs by means of a scale (see Table 2). The professional in expert panel evaluated the pair wise rating by using linguistic statements and expressions. Expert opinion (majority of expert's opinion)  helped to finalize the pairwise comparison matrix of barriers. We also conducted a group session to locate any major deviation in the pairwise comparisons and develop agreement among expert's opinions. This iterative process helped to build the rigor in the selection process framework. In addition, use of fuzzy set theory and TFNs helps in managing the consistency for matrices (pairwise comparisons). Fuzzy set theory allows experts to provide their inputs using an interval as being illustrated in Table 4 above. In this sense, pairwise comparison of attributes is shown in Table 5. In this way, fuzzy pair wise assessment matrix for categories of barriers is finalized (see Table 5).

Barrier Preference Weights and their Relative Importance
The preference weights were devised in correspondance to each category and their specific barriers using Chang's Extent Analysis method as mentioned in appendix A. The associated S i values can be computed, as follows Next, the minimum weight vectors for each fuzzy number are calculated: z 0 C 1 ð Þ ¼ min V S 1 ≥ S 2; S 3; ; S 4; S 5; S 6 À Á ¼ min 1; 1; 1; 1; 1 ð Þ Next, the normalized values and their corresponding significance weights are computed. Thus, the weight vectors for the categories of barriers have been established and hence their relative importance are established (see Table 6).
'Governance (0.2295)' is recognised as the most important category of barriers for smart city development followed by 'Economic (0.2040)'; 'Technology (0.1701)'; 'Social (0.1678)'; 'Environmental (0.1588)' and 'Legal and Ethical (0.0698)' are shown in Table  5. In the next level, relative and global preference weights of specific barriers are determined (see Table 7). Based on this, the final ranks of barriers for smart city development have been made. Global ranking of barriers is summarized in Table 7.
Since the group of experts comes from divergent background, and the objective is to understand their prioritization of drivers of a larger context, the consensus was not computed in the prioritization since that would reduce the difference of priorities among the barriers. Generally, there is an immense imprecision and vagueness present in the data collection process. Sensitivity analysis monitors the priority ranking of the recognized barriers to smart cities development. Further, it has a tendency that can determine the smallest change in the ranking with the changes in relative weights of the barrier. In this sense, it is sensible to verify the priority ranks by altering the weights of all the categories of barriers .
In this research, 'Governance (GOV)' category is the topmost ranked among all (see Table 6). This category would affect the other categories of barriers for smart city development. For that reason, we varied the 'Governance' category relative weights from values 0.1 to 0.9 and changes in the weights of other categories were noted correspondingly (see Table 8).
At 0.1 value of 'Governance' category, barrier SOC1 obtains the highest rank and barrier L&E5 obtains the lowest rank. Barrier SOC1 retains the highest rank and barrier L&E5 the lowest rank value until the normal value (0.2295) for Governance category is reached. From varying the Governance category weights value (from 0.3 to 0.9), barrier GOV3 holds highest rank, and the ranking of other barriers also vary accordingly. The changes in the weights of specific barriers when Governance category weights change from 0.1 to 0.9 have been presented in Table 9.
Global preference weight of the smart city development barriers based on sensitivity analysis is shown in Fig. 4.
From Fig. 4, insignificant changes can be noticed in the global weights of barriers, and thus, the proposed framework is robust enough to deal with human subjectivity and uncertainty in data under fuzzy conditions.

Discussion
According to Table 6, the categories of barriers follow the order in priority as -Governance (GOV) -Economic (ECO) -Technology (TECH) -Social (SOC) -Environmental (ENV) -Legal and Ethical (L&E). Governance (GOV) categories of barriers obtain the first rank. The implementation of smart city is highly context dependent (nations, government etc.) (Weisi and Ping 2014). Governance is one of key concerns in developing an efficient smart cities network. Thus, there is a higher need of better governance to manage several cities initiatives effectively . Within this category, 'Political instability (GOV3)' obtains the highest priority. Letaifa (2015) suggested that a smart city vision obstructed by political instability. Thus, leaders and practitioners should have a clear vision of the future; and make long-term plans, which could be only possible by political leadership and stability. 'Lack of cooperation and coordination between city's operational networks (GOV1)' is ranked after GOV3. There is a high need to promote cooperation and coordination between local authorities i.e. city's operational networks. 'Unclear IT management vision (GOV2)' comes next in the priority list. Chourabi et al. (2012) suggested that the integration of IT with development projects is crucial in smart city context. Next is 'Poor private-public participation (GOV5)' in this category. It means that policymakers should make efforts to promote private-public participations and investments for better governance in developing a smart city . 'Lack of trust between governed and government (GOV4)' comes after GOV5 according to their priority. Various researchers suggested that privacy and security issues are major concerns to develop trust between governed and government in the smart cities context. Khan et al. (2017) suggested in their research that user participation is crucial in managing smart cities data privacy and security related concerns to improve trust between governed and government. Finally, the 'Lack of developing a common information system model (GOV6)' stands last in the list. It means that common information system is modelled to collect city data to make meaningful decisions or actions in smart cities context. Economic (ECO) category acquires second place among other barrier categories. Smart cities will require huge infrastructure, modern technologies, based on massive interconnected networks of sensors, screens, cameras, smart devices, smart grid etc. to analyse data and or information. Guy et al. (2011) concluded that infrastructure's development depends on government regulations and financial resources availability. This particular category has five specific barriers -'Lack of competitiveness (ECO2)' obtains the utmost importance. This implies that urban areas need to be managed in such a way that leads to higher economic competitiveness, enhanced social security and ecological sustainability (Monzon 2015). However, the government fails to do that. Following this, the next is 'Global economy volatility (ECO4)' barrier in the list. Global economy volatility can influence the subsidies provided, and results in higher/lower greenhouse gas emissions. Subsequently, 'High IT infrastructure and intelligence deficit (ECO1)' shows that huge infrastructure and intelligent/ smart systems are required to develop smart cities. Nevertheless, it requires a lot of funds. The 'Higher operational and maintenance cost (ECO5)' barrier is next in terms of priority. Thus, technologists and practitioners must focus improving efficiency of the system for refining its sustainability (Mohanty et al. 2016). Finally, 'Cost of IT training and skills development (ECO3)' barrier is the last in the priority sequence i.e. smart city development requires higher IT training and skills, which is usually very costly.
Technology (TECH) acquired the third importance level among all the categories. Smart cities development needs higher research and technological innovations. There are different technological developments related to the IoT and Cloud computing in smart cities (Li et al. 2015;Petrolo et al. 2017;Whitmore et al. 2015). Li et al. (2015) and Whitmore et al. (2015) quoted in their research that IoT technologies will play key role in making cities more efficient and improving the lives of citizens. In this particular category, 'Lacking   barrier comes next to TECH1. Monzon (2015) suggested that a majority of the population living in these cities lack the access to technology. Hence, policymakers should make available the necessary technology and arrange training programs to educate the citizens for its accurate usage. Next, 'Privacy and security issues (TECH3)' comes in this category of barriers to smart city development. Many researchers highlighted the privacy and security issues in smart cities context (Elmaghraby and Losavio 2014;Belanche-Gracia et al. 2015;van Zoonen 2016;Zhang et al. 2017). 'System failures issues (TECH4)' barrier comes next. Colding and Barthel (2017) suggested smart city network is highly vulnerable so as provide ample room for cyber-attacks of different kinds and other forms of incidents such as industrial espionage, terrorists, equipment failures, worm infestations and natural disasters. Next to this is 'Integration and convergence issues across IT networks (TECH5)' barrier to smart city development. Smart cities require various heterogeneous components to communicate, but in designing, a flexible interface to integrate these heterogeneous components is challenging. Cyber physical networks need to be integrated and supported for an effective data exchange and analysis in smart cities environment. Finally, 'Poor data availability and scalability (TECH6)' is last in the list. Santana et al. (2017) suggested that policy planners should address the issues related to data quality and its scalability in smart city context. Janssen et al. (2017) and Pereira et al. (2017) revealed in their research that big open data initiatives can help in providing real-time weather forecast, pollution and traffic management, creating transparency, better decision and policy-making and crisis management etc., and contribute to enhance the delivery of public value in smart city contexts. Social (SOC) category of barriers occupies next place in the main priority list. There are several social concerns in developing of smart cities, such as public health and safety, education, and hospital facilities (Solanas et al. 2014). Policymakers need to deal with the social challenges in smart cities development. Colding and Barthel (2017) stipluated that there are multiple socio-economic challenges with massive demographic transition; detrimental environmental impacts may also follow unless adequate measures are taken. This category has four specific barriers to smart city development. 'Lack of involvement of citizens (SOC1)' is the top ranked barrier in this category. This could be validated from the research of Yang and Callahan (2007) that citizens are often criticized due to their low interest and participation. In this sense, policymakers should encourage citizens to contribute in decision-making processes for a sustainable city. Afterwards, 'Low awareness level of community (SOC2)' barrier comes in this category. It means that community engagement is very important for planning and implementing smart cities initiatives. Next to this is 'Geographical diversification problems (SOC3)' barrier to smart cities development.
In India, with a high geographical diversity, needs large amount of data to analyse urban issues and other geographical processes (Batty 2012;Liu et al. 2016). Finally, 'Degree of inequality (SOC4)' is last in the hierarchy list of barriers to smart cities development. Therefore, inequalities among the citizens must be reduced to plan smart cities initiatives.
Environmental (ENV) category of barriers occupies fifth place in the priority list. Thus, practitioners, policymakers and citizens must focus to observe various ecological parameters like air pollution, temperature, vibrations, and noise and make humans consume less energy and water, and even reduce greenhouse gas emissions etc. (Colding and Barthel 2017). This category has five specific barriers. 'Growing population problems (ENV2)' is at the top ranking. In India, the urbanisation is growing rapidly, and cities are likely to expand to 600 million by 2030. Higher population needs more resources to fulfil their requirements (Albino et al. 2015). Subsequently, 'Carbon emissions effect (ENV4)' is the next to come in this category. Sadorsky (2014) pointed out that growing urbanization leads to higher carbon emissions and results in lower sustainability. 'Lacking ecological view in behaviour (ENV1)' comes next. It means that a holistic approach should be adapted to promote ecological view in behaviour in citizens. Next to this is 'Degradation of resources (ENV5)' to smart cities development. Finally, 'Lack of sustainability considerations (ENV3)' is at the end in the list. Policy planners are suggested to include sustainability aspects while designing smart city networks for higher ecological benefits (Luthra et al. 2015).
Legal and Ethical (L&E) category of barriers holds the last place in priority list. Kitchin (2015) affirmed that there are several social, ethical and legal issues linked to a smart city initiative. Within this particular category, 'Lacking standardization (L&E2)' barrier is ranked first. Clearly, there is a lack of standards and policy directions on efficient applicability and managing of IoT based networks (Weber 2013;Perera et al. 2014;Zanella et al. 2014;Weber and Studer 2016). 'Issues of openness of data (L&E3)' comes next to the list. Rathore et al. (2016) identified the issues of openness of data are crucial in the smart city agenda. Enabling openness of real time data will help the government authorities as well as citizens. The next barrier i.e. 'Lack of transparency and liability (L&E4)' indicates that higher public involvement and superior transparency in governance is critical in smart cities development (Kandpal et al. 2017). Next barrier in this list is 'Cultural issues (L&E1)' to smart cities development. Last in the priority list is 'Lack of regulatory norms, policies and directions (L&E5)'. Well-defined regulating norms, polices and directions are needed that help in keeping the user-friendliness to the data users and monitoring all the stakeholders and parties being a part of the system. Further, we identified the global ranking of barriers to smart city development. According to global ranking of barriers, 'Lack of involvement of citizens (SOC1)'; 'Lack of competitiveness (ECO2)'; 'Global economy volatility (ECO4)'; 'Political instability (GOV3)' and 'Low awareness level of community (SOC2)' have been recognized as top five barriers to smart cities development in Indian context.

Theoretical Contributions
The present work has several unique contributions, given as follow: & This study reveals 31 key barriers within 6 categories to smart city development in developing economies, especially in India. The recognized barriers would facilitate policy makers in development of efficient smart city network in India. However, in the context of contributing to the theory, the explicit process of fuzzy AHP technique is provided to prioritise the barriers. The proposed research framework is logically sound in analysing the smart city development barriers. & This study seeks to know the relative importance of barriers in smart city development. This research work offers an in-depth understanding of barriers, with a focus on smart city development, for devising both the plan of action and the suggestive measures in dealing smart city barriers effectively.

Implications to Practice and Policy
This research is useful to the policymakers who are engaged with smart cities development initiatives in developing countries as India as this help government to understand the probable hindrances in successful adoption of smart city in practice. This work offers following important implications for the government and policymakers.

Role of Better Governance and Effective Decision-Making
The role of governance is prominent in developing smart cities within a country. Better governance will help to better coordination between central, state governments and parties involved in smart cities development to increasing the effectiveness of smart cities related policy decisions and involvement of the public. Government policymakers and practitioners may promote e-governance services to bring about accountability and transparency in decision-making process, which will help smart governance in developing smart cities.

Provision of Higher Resources and Infrastructure
This is important for the management of resources, such as equipment and humans required for performing the intended functions in developing smart cities. Funding and developing infrastructure for smart cities projects remains a challenge, therefore governments must focus on creative solutions and participation by both the public and private sectors. Consequently, having adequate funds and resources allocated are crucial in smart cities initiatives. This research may help removing resources and infrastructure related challenges.

Technological Advancements
In a truly smart city of the future, hyper connection and automation will be paramount. This capability will be dependent on integrating advanced information technologies such as IoT.
IoT will help to i) manage infrastructure decisions; ii) improve service level of the end users; iii) enhance levels of crosssector collaboration and iv) map government policies to deal with climate change related problems.

Awareness among Community
In developing smart cities, smart community development is necessary. Currently, the involvement of community is less integral in smart cities development, particularly in India. It is important to develop an efficient IT infrastructure by aligning the skills and expertise of people involved in the system. Therefore, practitioners and policymakers must focus on smart community planning to act as a catalyst in solving key issues such as environment, transport and security.

Higher Ecological Performance and Sustainable Development
Smart city development puts greater pressure on resource consumption, infrastructure, and development practices, which may have a negative impact on the environment. Threfore, it is crucial to measure and assess/evaluate? policies, infrastructure, socio-economic factors, resource use, emissions and any other processes that contribute to quality of life. Hence, logical planning is needed to address social and ecological sustainability challenges in smart city development.

Conclusion
Smart city development is gaining considerable recognition in the systematic literature and international policies in the last two decades. The present research seeks to recognise and prioritise barriers linked to smart city development to help policymakers in improving their sustainability in an Indian context. In this work, we used fuzzy AHP to demonstrate the importance of the potential barriers under fuzzy surroundings. A comprehensive review of keywords across various literature surveys disclosed 31 key barriers to smart cities development. These barriers were also confirmed further through a panel of experts. We categorised these barriers into six key categories with experts' consultation. The findings revealed 'Governance' is documented as the most significant category of barriers for smart city development followed by barriers r e l a t e d t o ' E c o n o m i c ; ' Te c h n o l o g y ' ; ' S o c i a l ' ; 'Environmental' and 'Legal and Ethical' categories. The relative and global preference weights of specific barriers are also determined. The sensitivity analysis is performed to verify the stability of the findings obtained in this study. This research is useful to the government and policymakers for eradicating the potential interferences in smart city development initiatives in developing countries like India.

Limitations and Future Scope
This work has its own limitations. Firstly, the findings of this study are highly influenced by experts' opinions. The developed solution model may be adopted in other developing countries with minor modifications. Secondly, this research is limited to identifing and prioritising the barriers of smart cities development under six broader categories. The recognised barriers may be evaluated further to know their causal relations in smart city development initiatives through DEMATEL/Fuzzy DEMATEL/Grey DEMATEL techniques. There is also a further scope to develop research based on drivers of smart cities development. Therefore, the future research could explore the prioritisation of the drivers. This could provide a useful prescription for policymakers to implement in addition to consideration of this research. Moreover, the researchers could also consider implementing ISM methodology (Al-Muftah et al. 2018;Dwivedi et al. 2017a;Hughes et al. 2016;Janssen et al. 2018) to understand the driving and dependent barriers. The citizens are one of the most important stakeholders of such developments. Hence, in order to avoid resistance from stakeholders and failure of such initiatives Hughes et al. 2016Hughes et al. , 2017, the perceptions of citizens and government employees towards various aspects of smart cities should also be explored by utilising established theories and models (see for example, AlAlwan et al. 2017;Dwivedi et al. 2011aDwivedi et al. , 2011bDwivedi et al. , 2013Dwivedi et al. , 2016Dwivedi et al. , 2017bDwivedi et al. , 2017cHossain and Dwivedi 2014;Kapoor et al. 2014aKapoor et al. , 2014bKapoor et al. , 2015Rana and Dwivedi 2015;Rana et al. 2015aRana et al. , 2015bRana et al. , 2016Rana et al. , 2017Shareef et al. 2011Shareef et al. , 2016aShareef et al. , 2016bShareef et al. , 2017Sinha et al. 2017;Slade et al. 2015;Veeramootoo et al. 2018;Weerakkody et al. 2013Weerakkody et al. , 2017 from information systems and electronic government domains.

Appendix
The calculation procedure of extent analysis method as described by Luthra et al. (2015) and Mangla et al. (2015) is described as below: The extent analysis values for the i th object is represented by O 1 g i ; O 2 g i ; O 3 g i ; ……::O p g i , Consequently, the fuzzy synthetic extent values are represented as given in below expression.
For taking the minimum and maximum values for fuzzy number, the degree of possibility is determined as given in below expression: Notably, O 1 and O 2 are two convex fuzzy numbers, and they must satisfy the following conditions: Next, 'm' denotes the ordinate of the highest intersection point M between the membership functions of two fuzzy numbers. Hence, M is given as: While the degree of possibility for 'k' convex fuzzy numbers O i (i = 1, 2……. . k) can be determined form the following expression: Þ; i ¼ 1; 2; 3; ……………::; k: Next, we assume z ' (C i ) = min V(S i ≥ S k ), for k = 1, 2, ……, n; k ≠ i; the weight vector in that case is given as: W ' = (z ' (C 1 ), (C 1 ), (C 1 )…………(C 1 )) T ; Where C i (i = 1, 2…... n) are the elements.
For normalization, the below highlighted expression is used. While, 'W' is a non-fuzzy number.

Survey Questionnaire
This questionnaire consists of three sections. Section [A] deals with the general information of the respondents and their respective background where they work. Section B helps in selecting the most suitable barriers and exploring their significance to smart cities development. Section C assists in examining the priority of concern of the selected barriers.

Section [A]: General Information
Please highlight only one choice in each question as follows: 1. What is your professional qualification? Please rate the following barriers on 5-point Likert scale ('1'-Not significant, '2'-Somewhat significant, '3'-Significant, '4'-Very significant, and '5'-Extremely significant). Further, you are also free to add any specific barrier within any main category, which you think, should be included into the list. Lack of cooperation and coordination between city's operational networks (GOV1) 2 Unclear IT management vision (GOV2) 3 Political instability (GOV3) 4 Lack of trust between governed and government (GOV4) 5 Poor private-public participation (GOV5) 6 Lack of developing a common information system model (GOV6) Please add any other barrier (in your opinion) Economic (ECO) 7 High IT infrastructure and intelligence deficit (ECO1) 8 Lack of competitiveness (ECO2) 9 Cost of IT training and skills development (ECO3) 10 Global economy volatility (ECO4)

11
Higher operational and maintenance cost (ECO5) Please add any other barrier (in your opinion)

Social (SOC)
12 Lack of involvement of citizens (SOC1) 13 Low awareness level of community (SOC2) 14 Geographical diversification problems (SOC3) 15 Degree of inequality (SOC4) Please add any other barrier (in your opinion)

Technology (TECH)
Barriers to smart cities development in India as reported in the literature

Section C: Analysing Identified Barriers to Determine Their Priority for Concern
After finalizing the key barriers to develop smart cities, author would analyse them to priority for concern (their relative importance). For determining their priority, it needs to construct the pair wise evaluation matrix for the identified main barriers and for the specific barriers as well. In view of that, please put your response in the pairwise evaluation matrices both for the key categories of barriers and specific barriers. Please use the given fuzzy linguistic scale for entering your responses.
Fuzzy linguistic scale for forming pairwise evaluation matrix.
Pairwise evaluation matrix for main barriers.
Pairwise evaluation matrix for specific barriers.
Pairwise evaluation matrix for specific barriers.
Pairwise evaluation matrix for specific barriers.
Pairwise evaluation matrix for specific barriers.
Pairwise evaluation matrix for specific barriers.
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