Having an ISO 9001 certification is important for several reasons, but primarily for improving your business. Mar 10th, 2021 iStock There are some industries that require a machine shop vendor to be ISO certified. Even if yours is not one that has this requirement, it is a great idea to make sure that your CNC machine shop has the ISO 9001 certification for quality and efficiency. IATF 16949 is the International Standard for Automotive Quality Management Systems by The International Automotive Task Force (IATF) members to the International Organization for Standardization (ISO) for approval and publication. Having an ISO 9001 certification is important for several reasons, but primarily for improving your business.