This book discusses three key aspects of business operations: sustainability, human factors and smart manufacturing, which make up modern business. The authors share their experiences in the transformation of enterprises to Industry 4.0/5.0 and the sustainability of steel production, as well as the reorganization of human factors using the example of the steel sector. The steel industry is covered both from a global perspective (key producers in the global steel market), as well as from a local and sectoral perspective (the companies that make up the sector of metal and metal product producers, using Poland as an example).