This article includes a page that categorizes the measurement range, repeatability, frequency and charateristics of 5 different measurement method. It's really the one-page easy reference for you anytime.
The typical casting defects include cast hole, shrinkage and 10 different more. Gain some knowledge on the methods of using HDR, 3D Imaging and Wide Magnification Range to solve these defective issues.
Do we really need all 100 types of fibre units? Of course no, but we do need exactly a few useful one to make sure your money and time spend are worth it. So don't lose this opportunity to learn the method of choosing the fitting type for your units!