Glossary
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| U | |
| There are 6 entries in the glossary. | |
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| Term | Definition |
| U chart | A control chart showing the count of defects per unit in a series of random samples |
| Unambiguous | (1) Not having two or more possible meanings. (2) Not susceptible to different interpretations. (3) Not obscurer not vague. (4) Clear, definite, certain |
| Unnatural Pattern | Any pattern in which a significant number of the measurements do not group them selves around a center line; when the pattern is unnatural, it means that outside disturbances are present and are affecting the process |
| Upper control limit (UCL) | Control limit for points above the central line in a control chart / A horizontal line on a control chart (usually dotted) which represents the upper limits of process capability |
| User | (ANSI) Any person, organization, or functional unit that uses the services of an information processing system. See: end user |
| User's guide | (ISO) Documentation that describes how to use a functional unit, and that may include description of the rights and responsibilities of the user, the owner, and the supplier of the unit. Syn: user manual, operator manual |
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