It is the business of the production engineer to know every single item that constitutes his finished product, and every step involved in the handling of every piece. He must know what is the most advantageous manufacturing quantity of every single item so as to secure uniformity of flow as well as economy of manufacture. He must know how long each step ought to take under the best attainable working conditions. He must be able to tell at any time the exact condition as regards quantity and state of finishedness of every part involved in his manufacturing process.
The engineer must be able not only to design, but to execute. A draftsman may be able to design, but unless he is able to execute his designs to successful operation he cannot be classed as an engineer. The production engineer must be able to execute his work as he has planned it. This requires two qualifications in addition to technical engineering ability: He must know men, and he must have creative ability in applying good statistical, accounting, and " system" methods to any particular production work he may undertake.
With regard to men, he must know how to stimulate ambition, how to exercise discipline with firmness, and at the same time with sufficient kindness to insure the good-will and cooperation of all. The more thoroughly he is versed in questions of economics and sociology, the better prepared will he be to meet the problems that will daily confront him. As economic production depends not only on equipment and plant, but on the psychological effect of wage systems, he must be able to discriminate in regard to which wage system is best applicable to certain classes of product.