# The Use of Mobile Applications for Sustainable Development of SMEs in the Context of Industry 4.0
## 1 Introduction  
The economic growth of a country largely depends on the ability of this particular country to support the development of entrepreneurship. Small- and medium-sized enterprises (SMEs) play a key role in the development of entrepreneurship. There is a special demand for individual entrepreneurial activity in the European Union, where 37% of the population wants to engage in entrepreneurial activity [1]. SMEs contribute 40% to the GDP in countries with emerging economies [2]. The income received by SMEs and research has shown the importance of SMEs in the national economy of each country. SMEs occupy the biggest part of firms in most countries, especially in countries with developing economies, (about 80-95%) [1, 2]. According to the World Trade Organization, SMEs represent over 90% of the business population, 60-70% of employment, and 55% of GDP in developed economies. As the world economy faces prevailing challenges, governments increasingly start to turn to SMEs as a significant element of sustainable and inclusive economic growth, namely for economic growth, poverty reduction, innovation, and job creation [3]. Modern society is undergoing a profound transformation under the influence of new technologies, and the manufacturing sector has undergone special changes. It is especiallydifficult for small and medium-sized enterprises to maintain the required level of competitiveness as they need to pay special attention to modernization, the development of new technologies, products, and services, reduce the amount of waste, reduce resource consumption, and also invest in personnel with the right skills [4]. The introduction of the latest technologies can be a tool for solving the problem of SME competitiveness. Replacing paper carriers with digital ones opens up opportunities to ensure the continued operation of enterprises even during a pandemic, as well as accelerate the exchange of information within the enterprise and outside it. The most popular solution for manufacturing enterprises is the implementation of technologies of Industry 4.0 [5], which implies the use of wireless mobile technologies and the digitalization of processes. Mobile technologies can be represented by mobile devices that make possible the mobility of employees and automate the processes of obtaining and processing data by mobile applications. New technology implementation requires vertical and horizontal integration, which includes a lot of activities and most importantly time. The widespread adoption of Industry 4.0 devices and technologies has increased the demand for technological innovations not only by manufacturers but to a greater extent by consumers. In the modern economy, the consumer forms the demand and characteristics of new products, and therefore enterprises try to organize their production to be able to flexibly respond to the changing consumers' needs. Features of the modern market can be summarized as:  
* a consumer-oriented market,
* a highly competitive market,
* a market for a wide range of goods with a life cycle but a high level of technology,
* a market where production is characterized by full utilization of production capacities and use of low consumption technologies,
* a market characterized by a high level of service [6]. Thus, the main obstacles that need to be overcome by small- and medium-sized enterprises to take a competitive position in the market are the following:  
* preparation and provision benefits of new technologies to employees,
* preparing the basis for the successful implementation of innovations,
* selection and preparation of the courses for personnel training programs,
* design a high-quality organizational structure of the enterprise to ensure the quality of services and products,
* effective planning. Such criteria [PERSON] et al. [7] define and evaluate by technology TOE (technology-organization-environment), multiple-criteria decision-making approach (MCDM), and influence network relations digraph (INRD) with accordance to DEMATEL analytic network process [7].