Shyama Prasad Mukherjee retired as the Centenary Professor of Statistics at Calcutta University, where he was involved in teaching, research and promotional work in the areas of statistics and operational research for more than 35 years. He was the Founder Secretary of the Indian Association for Productivity, Quality and Reliability and is now its Mentor. He received the Eminent Teacher Award [2006] from Calcutta University, P.C. Mahalanobis Birth Centenary Award from the Indian Science Congress Association [2000] and Sukhatme Memorial Award for Senior Statisticians from the Government of India [2013]. A Fellow of the National Academy of Sciences of India, Professor Mukherjee has about 80 research papers to his credit. He was a Vice-President of the International Federation of Operational Research Societies (IFORS ). Bikas Kumar Sinha was affiliated to the Indian Statistical Institute (ISI), Kolkata, India for more than 30 years until his retirement in 2011. He has travelled extensively within USA and Europe for collaborative research and teaching assignments. He has more than 140 research articles published in peer-reviewed journals and almost 100 research collaborators worldwide. His research interests cover a wide range of theoretical and applied statistics. He has co-authored three volumes on Optimal Designs in Springer's Lecture Notes Series in Statistics (Vol. 54 in 1989, Vol. 163 in 2002 and Vol. 1028 in 2014) and another volume on theory and applications of Optimal Covariate Designs, also published by Springer (2015). Asis Kumar Chattopadhyay is a Professor of Statistics at Calcutta University, Kolkata, India, from where he also obtained his PhD in Statistics. With over 50 papers in respected international journals, proceedings and edited volumes, he has published three books on statistics including two published by Springer - 'Statistical Methods for Astronomical Data Analysis' (Springer Series in Astrostatistics, 2014) and 'Statistics and its Applications: Platinum Jubilee Conference, Kolkata, India, December 2016' (Springer Proceedings in Mathematics & Statistics, 2018). His main interests are in stochastic modeling, demography, operations research and astrostatistics.