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What are the categories of defects?

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posted Apr 8 by Arunkumaarts

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There are three main categories of defects:
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Wrong: The requirements have been implemented incorrectly. This defect is a variance from the given specification.
Missing: There was a requirement given by the customer and it was not done. This is a variance from the specifications, an indication that a specification was not implemented, or a requirement of the customer was not noted properly.
Extra: A requirement incorporated into the product that was not given by the end customer. This is always a variance from the specification, but may be an attribute desired by the user of the product. However, it is considered a defect because it's a variance from the existing requirements. 
answer Apr 9 by Arunkumaarts
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