Excerpt from Elementary Mathematical ProgrammingOperations research differs from almost anything else industry has done in the past, chie?y in method and approach to a problem. The techniques of operations research require an exacting state ment of the problem with all the variables and factors included with their proper interrelationships. This requirement causes a formulation of the problem which before this time was usually overlooked. Once this habit of precise formulation of problems is established, then the new viewpoint of operations research is pos sible in attacking industrial problems.