Kapil Gupta is working as Associate Professor in the Dept. of Mechanical and Industrial Engineering Technology at University of Johannesburg. He obtained Ph.D. in mechanical engineering with specialization in Advanced Manufacturing from Indian Institute of Technology Indore, India. Advanced machining processes, sustainable manufacturing, green machining, precision engineering and gear technology are the areas of his interest. He has authored several International Journal and Conference articles. He has also authored and edited international books on hybrid machining, advanced gear manufacturing, micro and precision manufacturing, and sustainable manufacturing. He is also serving editorial and advisory boards of international journals and conferences. He is a rated Researcher in South Africa. Currently, he is supervising many Masters and Doctorate students and hosting Postdoctoral Fellows who are conducting research in advanced and sustainable manufacturing. Sustainability and Fourth Industrial Revolutions are the major topics he is busy working on at present. Alokesh Pramanik is currently a Senior Lecturer in the Department of Mechanical Engineering at Curtin University, Perth, Australia. Prior to that, he held research fellow and research engineering positions at Deakin University and Swinburne University of Technology, respectively. He has edited two books and written sixteen book chapters and dozens of peer-reviewed articles on machining, materials, and tribology. His research interests include machining processes, wear and friction, composite materials, biomaterials, and thin films.