Test certifications: Seek out machining suppliers with sector certifications like ISO 9001
https://wiki.3cdr.ru/wiki/index.php/Precision_Machining_in_Aerospace:_Conference_the_Sky%27s_Arduous_Needs_with_CNC_Machining_17716
Test certifications: Hunt for machining suppliers with industry certifications like ISO 9001, which ensures high quality administration methods are set up