Md. Rezaul Karim  obtained his Bachelor of Science and Master of Science degrees in Statistics from the University of Rajshahi, Bangladesh, and his Doctor of Engineering degree from the University of Electro-Communications, Tokyo, Japan. For the last 24 years, he has been working at the Department of Statistics at the University of Rajshahi, Bangladesh, where he is currently a Professor. He also served as a visiting faculty at the Luleå University of Technology, Sweden. His research interests include reliability analysis, warranty claim analysis, lifetime data analysis, industrial statistics, biostatistics, and statistical computing. He has over 30 publications in statistics, reliability, warranty analysis, and related areas, and has presented about 40 papers at numerous conferences and workshops in eight countries. He is a coauthor of the book Warranty Data Collection and Analysis (published by Springer in 2011) and has contributed chapters to several books. He serves on the editorial boards of several journals including Communications in Statistics, Journal of Statistical Research, International Journal of Statistical Sciences, Journal of Scientific Research, and Rajshahi University Journal of Science and Engineering. Further, he is a member of five professional associations.

M. Ataharul Islam  is currently the QM Husain Professor at the Institute of Statistical Research, University of Dhaka, Bangladesh. He was formerly a Professor of Statistics at the University of Dhaka, Universiti Sains Malaysia, King Saud University, and the East West University of Dhaka. He served as a visiting faculty at the University of Hawaii and University of Pennsylvania. He is a recipient of the Pauline Stitt Award, Western North American Region (WNAR) Biometric Society Award for content and writing, East West Center Honor Award, University Grants Commission Award for book and research, and the Ibrahim Memorial Gold Medal for research. He has published more than 100 papers in international journals, mainly on longitudinal and repeated measures data including multistate and multistage hazard models, statistical modeling, Markov models with covariate dependence, generalized linear models, and conditional and joint models for correlated outcomes. He has authored books on Foundations of Biostatistics, Analysis of Repeated Measures Data and Markov Models, has coedited one book, and contributed chapters to several others.