This chapter, which summarises both the literature and empirical parts of the analysis, presents the constructs of smart steel manufacturing model, which is positioned in a sectoral environment that will change under the influence of the decarbonisation of industries, including the steel industry and technological trends of Industry 4.0. The concept of Industry 4.0 is the current vision of industrial development, shaping the future of many industries, including metallurgy. Technological pillars of this concept create new business models based on solutions of smart manufacturing. Therefore, it is crucial to investigate its dimensions in order to realise efficiencies in the business environment. In this book, the industrial trends are shortly described as well as how they would help companies achieve their objectives concerning Industry 4.0 in sustainable development. Key industry trends frame changes in business models. Many modern trends are strongly oriented towards Industry 4.0, but the technological changes companies are undertaking must contribute to achieving sustainable development.