September 2015
Intermediate to advanced
652 pages
18h 20m
English
Content preview from Quality Assurance
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565Appendix V
Approaches to Error Proofing
Prevention: Prevents errors from creating defects
Detection: Detects defects and immediately initiates corrective action
to prevent multiple defects from forming
Definition of a Defect
A defect is the result of any deviation from product specications that may
lead to customer dissatisfaction. To classify as a defect:
• The product has deviated from manufacturing or design
specications
• The product does not meet internal and/or external customer
expectations
Definition of an Error
An error is any deviation from a specied manufacturing process. There can
be an error without a defect. There cannot be a defect without an error rst.
The result of an error is demonstrated in a defect.
Error-Proofing Approach ...
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