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Classification of Defects

February 24, 2015
(Defect Elimination)

The listing of possible defects of a unit, classified according to their seriousness.

Commonly used classifications:

  • Class A, B, C, D
  • Critical, Major, Minor, Incidental
  • Critical, Major, Minor

Definitions of these classifications require careful preparation and tailoring to the product(s) being sampled to enable accurate assignment of a defect to the proper classification. 

Tip excerpted from: The Professional’s Guide to Maintenance and Reliability Terminology by Ramesh Gulati, Jerry Kahn and Robert Baldwin

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