Anshuman Kumar Sahu is a post-doctoral researcher at IDMEC, IST, University of Lisbon, Lisbon, Portugal. His areas of research are additive manufacturing, rapid prototyping and rapid tooling, non-traditional machining, powder metallurgy, and optimization of manufacturing processes. He is presently working on Lean and Green Manufacturing in Industry 4.0. Siba Sankar Mahapatra is working as a professor (HAG) in the Department of Mechanical Engineering, National Institute of Technology, Rourkela, India. He has more than 30 years of experience in research and teaching. He has published 300 research articles in reputed peer-reviewed international journals. His h-index in Google scholar is 62 with more than 16,068 citations. He has three Indian patents. He has authored four books. His academic interest includes rapid prototyping, non-traditional machining, modeling and simulation. He is busy carrying out many projects with national and international partners on additive manufacturing, modern machining, and manufacturing optimization.