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Note added at 33 мин (2021-05-06 10:21:15 GMT)
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NDT Certification System

The need for competent personnel to perform NDT tasks is paramount in all industries. In order to determine competency, systems have been devised to ensure that NDT personnel have the proper training, have passed written and practical examinations, and have enough experience to properly perform NDT tasks using the applicable test method or technique. Personnel that have met all three of these requirements are said to be “qualified,” and once qualified they can be certified, which is defined in several different ways under the various NDT systems.

The following terms are used here for descriptive purposes only and should not be considered to be formal (or “official”) definitions:

Certification Standard: National or international documents describing the requirements for the qualification and certification of NDT personnel. (See the Codes and Standards web page.

Recommended Practice: A formal document that provides nationally or internationally recognized guidelines, and describes the qualification and certification process for NDT personnel. If mandated by governing codes, standards, specifications or contract documents, these guidelines become requirements for the specified project.

Certification System: The combination of the standard or recommended practice governing the certification requirements, the third-party certification program (if applicable) or the employer's written practice, and additional employer documents used in the administration of their certification program.

Certification Program: The documented employer’s or certification body’s procedures and processes based on a standard or recommended practice, which defines the requirements of that specific program.
https://asnt.org/MajorSiteSections/Standards/NDT_Certificati...