Definition

IATF 16949: A specified amount of time or set of conditions between calibrations during which the calibration parameters of ameasuring device are considered valid.

Definition

IATF 16949: An estimate of the combined variation of measurement errors (random or systematic) based on a short-term assessment of the measurement system.

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.

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.

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.

Definition

Minitab : there are 2 common chi-squared tests : Pearson chi-square test and likelihood-ratio chi-square test. Each chi-square test can be used to determine whether or not the variables are associated (dependent).

The Pearson chi-square statistic (χ2) involves the squared difference between the observed and the expected frequencies.

The likelihood-ratio chi-square statistic (G2) is based on the ratio of the observed to the expected frequencies.

Definition

6 sigma: A measure of the correlation between the dependent and independent variables in a Regression Analysis.

Definition

IATF 16949: The range of values expected to include ( at a some desired probability called a confidence level) the true value of a parameter.

6 sigma: A range of numbers in which population parameters are likely to fall

Definition

6 sigma: The fixed probability of correctly accepting the null hypothesis

Definition

MSA: The range of values expected to include (at some desired probability called a confidence level) the true value of a parameter.

Definition

MSA : Conformance is a conclusion given following a product control situation when a measurement result is compliant with a defined specification.

Definition

MSA: It is the difference in the variation of the measurements taken over time. It may be viewed as repeatability over time.

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.

Definition

ISO 3534: Graphique sur lequel sont reportées les valeurs d'une mesure statistique faite sur une série d'échantillons dans un ordre particulier pour orienter le processus en fonction de cette mesure et pour contrôler et réduire la variation.

Definition

6 sigma: Control Limits are typically set +/-3 standard deviations from the centerline to determine whether or not the process is in control.

Definition

ISO 3534: Valeur utilisée pour déterminer la stabilité d'un processus.

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.

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.

Definition

ISO 3534: Sum of products of deviations of pairs of random variables in a sample from their sample means divided by the number of term in the sum minus one.

Definition

MSA: It is the ratio of the customer-specified tolerance to six standard deviations of the short-term process variation

6 sigma: A capability index that measures the potential capability of a process to meet expected specification limits, or tolerance levels, in the short term, assuming the process is ideally centered (regardless of where the process is actually centered).

Definition

MSA: It is a ratio of the distance between the process average and the closet specification limit, to three standarddeviations of the short-term process variation.

6 sigma: A capability index that measures the potential capability of a current process to meet expected specification limits, or tolerance levels, in the short term, using the current process average.

Definition

Definition

MSA : fixed and defined conditions of measurement (instrument, standard, method, operator, environment, and assumptions)