Kelly Allan has seen many examples of continual improvement gone awry. He offers this cautionary tale from a client.

Of all the various NDT disciplines, it is safe to say that remote visual inspection (RVI) is the one most widely used across all industries. While radiography and ultrasonic testing, for example, are essential in certain situations and applications, there is no real substitute for being able to visually inspect and monitor the condition of internal components.

Since its origin in the late 19th century when a magnetic compass was used to detect defects in magnetized cannon barrels, the selection of the right magnetic particle inspection system could be challenging.