Calibration
Created Mar 29, 2021 (15:20)
by GUENNOUNI, Nathalie
Definition
GUM/VIM: Ensemble des opérations établissant, dans des conditions spécifiées, la relation entre les valeurs de la grandeur indiquées par un appareil de mesure ou un système de mesure, ou les valeurs représentées par une mesure matérialisée ou par un matériau de référence, et les valeurs correspondantes de la grandeurs réalisées par des étalons.
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Calibration interval
Created Jun 12, 2019 (11:35)
by Anurekha VIJAYARAGHAVAN
Definition
TS 16949: A specified amount of time or set of conditions between calibrations during which the calibration parameters of ameasuring device are considered valid.
Capability
Created Jun 12, 2019 (11:35)
by Anurekha VIJAYARAGHAVAN
Definition
MSA: Capability indicies are used to predict the performance of a process by comparing the width of process variation to the width of the specified tolerance.
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Cause and Effect Diagram
Created Jun 12, 2019 (11:35)
by Anurekha VIJAYARAGHAVAN
Definition
6 sigma: The Cause and Effect Diagram (C&E Diagram) is a fishbone-shaped diagram that helps a team brainstorm potential root causes of a defect. The problem to be solved is placed at the head of the fish and the six thought-generating categories - Personnel, Machines, Materials, Methods, Measurements and Environment - are placed at the ends of the fish bones.
Certified reference material
Created Jun 12, 2019 (11:37)
by Anurekha VIJAYARAGHAVAN
Definition
Guide EURACHEM: Reference material, accompanied by a certificate, one or more of whose property values are certified by a procedure, which established its traceability to an accurate realisation of the unit in which the property values are expressed, and for which each certified value is accompanied by an uncertainty at a stated level of confidence.
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Confidence Interval
Created Jun 12, 2019 (11:40)
by Anurekha VIJAYARAGHAVAN
Definition
TS 16949: The range of values expected to include ( at a some desired probability called a confidence level) the true value of a parameter.
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Confidence Level
Created Jun 12, 2019 (11:44)
by Anurekha VIJAYARAGHAVAN
Definition
6 sigma: The fixed probability of correctly accepting the null hypothesis
Control chart
Created Jun 12, 2019 (11:47)
by Anurekha VIJAYARAGHAVAN , last modified Aug 18, 2023 (14:13)
by GUENNOUNI, Nathalie
Definition
MSA: A graph of a process characteristic, based on sample measurements in time order, used to display the behavior of a process, identify patterns of process variation,assess stability, and indicate process direction.
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Control limit (CL)
Created Jun 12, 2019 (11:49)
by Anurekha VIJAYARAGHAVAN , last modified Aug 18, 2023 (14:13)
by GUENNOUNI, Nathalie
Definition
6 sigma: Control Limits are typically set +/-3 standard deviations from the centerline to determine whether or not the process is in control.
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Correlation coefficient
Created Jun 12, 2019 (11:50)
by Anurekha VIJAYARAGHAVAN
Definition
: It is a measure of the degree of linear relationship between two sets of data.The correlation coefficient ranges from -1 a perfect negative relationship, through 0 (no relationship), to +1, a perfect positive relationship.
Covariance
Created Jun 12, 2019 (11:50)
by Anurekha VIJAYARAGHAVAN , last modified Aug 18, 2023 (14:13)
by GUENNOUNI, Nathalie
Definition
ISO 3534: Somme des produits des écarts des couples de variables d'un échantillon par rapport à leur moyenne, divisée par le nombre de termes de la somme moins 1.
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Cp
Created Jun 12, 2019 (11:51)
by Anurekha VIJAYARAGHAVAN
Definition
MSA: It is the ratio of the customer-specified tolerance to six standard deviations of the short-term process variation
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