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Top1. Introduction
A novel smart city market evolves radically and it is estimated to reach US $3 trillion by 2020 and exceed the size of all traditional business sectors (Amarnath, 2010; Kohno et al., 2011). Giles (2012) located the source of this money on embedded operational efficiency, as well as on new entrepreneurship. Many vendors have entered this market and develop either end-to-end or focused solutions, like IBM (2012); Alcatel-Lucent (2011); Schneider (2014); Hitachi (2013); Huawei (2014); Siemens (2014); Oracle (2014); Microsoft (2014); Fujitsu (Hisatsugu, 2014); SAP (2014), CISCO (2014) etc.
However, most corresponding investments are still based on public funding. Anthopoulos and Fitsilis (2014a; 2014b) demonstrated that smart cities (34 and 100 examined respectively) mainly concern public projects, with only 2 cases representing private investments and about 10 concerning PPPs. These findings question the reluctance of the private sector to place own funding on smart cities. CISCO (Falconer and Mitchell, 2012) justified this phenomenon due to city complexities (multiple parties, stakeholders, and processes) and different interests. Another potential reason for this reluctance is described by Giles (2012), who claimed that the value of the smart city market is still under development and enterprises prefer to secure their involvement with government support, standardization and business models. To this end, various smart city standards are under development by standardization bodies (i.e., PAS180 (BSI, 2014), ISO 37120:2014 (ISO, 2014) etc.), which reduce smart city uncertainties, but they do not provide information about the source of smart city profit and other potential values. This paper addresses this fact and aims to answer the following research questions:
These research questions are very important to be answered due to the above observation, but also due to the continuous transformation of smart city approaches, which require careful planning (Anthopoulos and Fitsilis, 2014a). Moreover, the answers to these questions will be useful to clarify who must undertake a smart city initiative; why such an initiative must be implemented (value proposition); and how a smart city can sustain in economic terms. From the answers of these questions both the smart city industry and local governments will be benefit, since they will realize the roadmap for smart city success, from corresponding requirements (key-resources); to the value that the smart city proposes to its customers; and to the relationship management processes that must be taken care. Additionally, RQ2 is very important to be answered for a smart city planner, since he has to select the optimal business model and as well as to be familiar of the selection process.