Radosław Wolniak is a Full Professor at the Department of Economics and Informatics at the Silesian University of Technology (Poland). For over two decades, he has been dealing with the issues of quality management, Industry 4.0, and smart city. He has been listed in Stanford University’s ranking of the world’s top 2% scientists.Joanna Rosak‑Szyrocka, PhD, is an Assistant Professor at the Faculty of Management at Częstochowa University of Technology. Her research interests focus on quality management and process improvement, increasingly linked to digital transformation in Industry 4.0 and Quality 4.0 concepts, as well as sustainability‑oriented management topics such as ESG (Environmental, Social, and Governance) and responsible innovation. In her scientific output, she addresses organizational and technological determinants of efficiency and quality in manufacturing and service settings, often emphasizing how data‑driven tools (e.g., digital quality systems, analytics, and AI‑related solutions) can support continuous improvement and sustainable performance. She has been listed in Stanford University’s ranking of the World’s Top 2% Scientists.

• Introduction 1. Quality 4.0 Frameworks in Smart Cities 2. Challenges in Implementing Quality 4.0 in Smart Cities 3. Citizens and Society in Quality 4.0: Trust, Inclusion, and Digital Equity 4. Indicators, Evaluation, and Digital Security in Quality 4.0 for Smart Cities 5. Case Studies of Quality 4.0 in Smart Cities 6. Future Trends in Quality 4.0 for Smart Cities 7. Conclusion and Recommendations

Radosław Wolniak is a Full Professor at the Department of Economics and Informatics at the Silesian University of Technology (Poland). For over two decades, he has been dealing with the issues of quality management, Industry 4.0, and smart city. He has been listed in Stanford University’s ranking of the world’s top 2% scientists.Joanna Rosak‑Szyrocka, PhD, is an Assistant Professor at the Faculty of Management at Częstochowa University of Technology. Her research interests focus on quality management and process improvement, increasingly linked to digital transformation in Industry 4.0 and Quality 4.0 concepts, as well as sustainability‑oriented management topics such as ESG (Environmental, Social, and Governance) and responsible innovation. In her scientific output, she addresses organizational and technological determinants of efficiency and quality in manufacturing and service settings, often emphasizing how data‑driven tools (e.g., digital quality systems, analytics, and AI‑related solutions) can support continuous improvement and sustainable performance. She has been listed in Stanford University’s ranking of the World’s Top 2% Scientists.

• Introduction 1. Quality 4.0 Frameworks in Smart Cities 2. Challenges in Implementing Quality 4.0 in Smart Cities 3. Citizens and Society in Quality 4.0: Trust, Inclusion, and Digital Equity 4. Indicators, Evaluation, and Digital Security in Quality 4.0 for Smart Cities 5. Case Studies of Quality 4.0 in Smart Cities 6. Future Trends in Quality 4.0 for Smart Cities 7. Conclusion and Recommendations

Radosław Wolniak is a Full Professor at the Department of Economics and Informatics at the Silesian University of Technology (Poland). For over two decades, he has been dealing with the issues of quality management, Industry 4.0, and smart city. He has been listed in Stanford University’s ranking of the world’s top 2% scientists.Joanna Rosak‑Szyrocka, PhD, is an Assistant Professor at the Faculty of Management at Częstochowa University of Technology. Her research interests focus on quality management and process improvement, increasingly linked to digital transformation in Industry 4.0 and Quality 4.0 concepts, as well as sustainability‑oriented management topics such as ESG (Environmental, Social, and Governance) and responsible innovation. In her scientific output, she addresses organizational and technological determinants of efficiency and quality in manufacturing and service settings, often emphasizing how data‑driven tools (e.g., digital quality systems, analytics, and AI‑related solutions) can support continuous improvement and sustainable performance. She has been listed in Stanford University’s ranking of the World’s Top 2% Scientists.

• Introduction 1. Quality 4.0 Frameworks in Smart Cities 2. Challenges in Implementing Quality 4.0 in Smart Cities 3. Citizens and Society in Quality 4.0: Trust, Inclusion, and Digital Equity 4. Indicators, Evaluation, and Digital Security in Quality 4.0 for Smart Cities 5. Case Studies of Quality 4.0 in Smart Cities 6. Future Trends in Quality 4.0 for Smart Cities 7. Conclusion and Recommendations