Issues that are not identified during the prototyping stage can be repeated in low-volume production. Rework involves more than additional machining. It can also lead to material scrap, repeated surface finishing, delivery delays, and assembly failures. Effective DFM at an ISO 9001 CNC machining manufacturer should identify and address these risks before programming and material preparation begin. DFM Aligns Tolerances With How the Part Will Function and Be Inspected A tolerance referenced on a drawing does not always reflect the tolerance needed by a manufactured part — a tolerance may have been included as a standard carry-over from a prior…