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In quality management, a nonconformity (sometimes referred to as a non conformance or nonconformance or defect) is a deviation from a specification, a standard, or an expectation. Nonconformities or nonconformance can be classified in seriousness multiple ways, though a typical classification scheme may have three to four levels, including ...
A product defect is any characteristic of a product which hinders its usability for the purpose for which it was designed and manufactured. Product defects arise most prominently in legal contexts regarding product safety , where the term is applied to "anything that renders the product not reasonably safe". [ 1 ]
Design defects occur where the product design is inherently dangerous or useless (and hence defective) no matter how carefully manufactured. In other words, the defective product is the same as every other one on the same assembly line because it is exactly what the manufacturer designed and intended to build, but the plaintiff is contending ...
In legal disputes regarding product liability, a consumer-expectations test is used to determine whether the product is negligently manufactured or whether a warning on the product is defective. Under this test, the product is considered defective if a reasonable consumer would find it defective. The test is typically applied to non-complex ...
The Third Restatement of the Law, Torts: Products Liability §2(b) [1] favors the risk-utility test over the Second Restatement of the Law, Torts §402(a), which favored the consumer expectations test. §2(b) states, in part, "A product is defective when, at the time of sale or distribution...is defective in design. A product is defective in ...
If the seller has attempted to repair the defective product and failed, the action must be instituted within one year of the date of the last attempt to correct the defect. If the seller knew of the defect at the time of sale but sold the product anyway, the action is available for one year from the date the buyer discovered the defect.
A defect can be defined as a nonconformance of a quality characteristic (e.g. strength, width, response time) to its specification. DPMO is stated in opportunities per million units for convenience: processes that are considered highly capable (e.g., processes of Six Sigma quality) are those that experience fewer than 3.4 defects per million ...
One technique is to fix sample size so that there is a 50% chance of detecting a process shift of a given amount (for example, from 1% defective to 5% defective). If δ is the size of the shift to detect, then the sample size should be set to n ≥ ( 3 δ ) 2 p ¯ ( 1 − p ¯ ) {\displaystyle n\geq \left({\frac {3}{\delta }}\right)^{2}{\bar {p ...