RAJ KUMAR BACHAR has been presently pursuing his Ph.D. degree on " Some Mathematical Model on Sustainable Smart Production Systems" at Kazi Nazrul University, West Bengal, India. He received his B.Sc in Mathematics and M.Sc in Applied Mathematics from The University of Jadavpur, Kolkata, India in the year 2002 and 2004 respectively. During his undergraduate studies in Mathematics, at Jadavpur University, Kolkata, India, he took several courses related to Algebra (Classical, Modern, and Linear), Real Analysis, Differential Equations, Analytical Geometry of Two and Three Dimension, Vector Algebra and Analysis, Mechanics, Linear Programming, Mathematical Theory of Probability, Numerical Analysis. During his Master’s degree, he also attended advanced courses in Optimization Techniques, Queuing Theory, Stochastic Process, and Discrete-Event Simulation, Inventory Model, Supply Chain Management, Numerical Analysis, Methods of Approximation, Abstract Algebra, Linear Algebra, Partial Differential Equation, Ordinary Differential Equation, Real Analysis, Complex Analysis, Programming in C, C++, Fortran. He has completed the internship under the guidance of Prof. Biswajit Sakar in the laboratory entitled "Smart Manufacturing & Operations Management", Yonsei University, Seoul, South Korea in the year 2019. He has more than 16 years of teaching experience in Mathematics up to class 12 standard in different schools including Joykrishnapur High School (H.S), Sir Nripendra Nath Institution (H.S), Tardaha High School (H.S), West Bengal, India. He is presently working as Headmaster (Head Teacher/ Principal) at Tardaha High School (H.S), South 24 Parganas, West Bengal, India. His main teaching interest includes Algebra, Calculus (both Integral and Differential), Differential Equation, Complex Numbers, Infinite Series, Matrices, Determinants, Continuity and Differentiability, Limit, Sets, Relations, Functions, Vectors, Three-dimensional Geometry, Probability, and Statistics. He has already published different research papers in reputed international journals. His main research interests include supply chain management, inventory management, smart manufacturing, and sustainability.