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Defect

A case or incident where a product or service fails to meet customer requirements or specification requirements.

Defects, if found during initial phases of a process, are less expensive to fix. If found during a quality inspection, become a little more expensive, and if found by a customer, may have an enormous negative outcome due to expense to fix and may have an everlasting poor customer opinions of the product or services.

Commonly confused with defective.

For six sigma, make sure that defects cannot occur in a process by using a well thought out process design, DFSS, (design for six sigma), and monitor the process by using statistical process control.

If a process is the cause, one should utilize a process improvement program that may include the use of a cause and effect diagram, also called a "Fishbone Diagram" or "Ishikawa Diagram".

For more information see control charts, control plans, an overview of  SPC, (statistical process control), information on X-Bar and Range charts, DPO, (Defects per Opportunity), LTPD, (Lot tolerance percent defective), and proportion defective.

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Last Updated: Saturday, 10-Jun-06 15:50:57 PDT

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