ISE Introduction to Operations Research by Frederick Hillier
Two features account for this success. First, the editions have been outstanding from students points of view due to excellent motivation, clear and intuitive explanations, good examples of professional practice, excellent organization of material, very useful supporting software, and appropriate but not excessive mathematics. Second, the editions have been attractive from instructors points of view because they repeatedly infuse state-of-the-art material with remarkable lucidity and plain language.