To understand the current non-destructive testing (NDT) world, it is perhaps a good idea to look back at things historically. By doing this, changes which have taken place become apparent, and very soon one can conclude that this is actually quite significant! Obviously, this is true for all industries but certainly also in NDT. This article aims to address the ever changing role of the operator in this perspective. The oldest and most used non-destructive test is visual inspection. To test whether the quality of a product is in accordance with what was actually agreed upon between manufacturer and client, simply looking at the product already says a great deal. Neanderthal man would probably not take delivery of a clay pot with a big hole in the bottom without grabbing his bludgeon to explain a thing or two to the manufacturer. In relation to visual inspection, demands placed on the inspector are mainly a deep knowledge about the product and, obviously, visual acuity.
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