"Operations Research" is a well-established textbook by , a prolific author of academic books, and Dr. D. S. Hira , his frequent co-author. Originally published in 1976, the book has been updated through several editions, with the 7th edition being a commonly referenced version. It is published by S. Chand and Company , a respected academic publisher in India. The book is designed to be accessible, not requiring advanced math but assuming a basic understanding of differentiation and integration.