Cgk decreases as the difference between the gage's mean measurement and the reference value increases. A Cgk value of 1.33 is a common benchmark value to denote a capable gage – one that is both precise (good repeatability) and accurate (low bias).

Para evaluar la repetibilidad de un sistema de medición, Minitab calcula la métrica Cg para comparar la variación del estudio (la dispersión de las mediciones del sistema de medición) con un porcentaje de la tolerancia.

Mar 19, 2000 · Cg/Cgk are Instrument Capability Indexes. The differences are what we take for allowable and actual variation. For Cp, the actual variation is the process variation, and the allowed variation is the specification range.

P-value for bias = 0.021. Because the p-value is less than a significance level of 0.05, the null hypothesis for the test of bias=0 must be rejected. The engineer can conclude that there is statistically significant bias present in the measurement system. Cg = 0.53 and Cgk = 0.42.

This is the first step in beginning to analyze how good a measurement device is and should be done before going on to the Gage R&R studies. The Type 1 gage study compares the …

Dec 18, 2017 · Gage capability is also commonly expressed as Cg and Cgk. Cg refers to the ratio between precision and tolerance (the potential capability) while Cgk denotes the ratio between the accuracy and the tolerance (the actual capability).

Mar 18, 2024 · This guide demystifies gage repeatability and the crucial capability indices Cg and Cgk, enhancing your grasp on these concepts for improved application and analysis.

Apr 7, 2020 · Cgk measures the deviation of measured values between a master and the specimen, or reproducibility. Cg is a measurement of the deviation of values across a study, or repeatability. If the Cg and Cgk are both ≥1.33 a measurement system is thought to be “capable”.

If Cg or Cgk are < 1.33, the measurement device is not capable and needs to be improved. If Resolution % of Tolerance (RE%) is <= 5%, the resolution is acceptable.

Summary ype 1 gage study. This is the first step in beginning to analyze how good a measurement device is and should be done before going on the Gage R&R studies. The Type 1 gage study compares the repeatability and bias of the measurement device to the tolerance. Two capability ratios, Cg and Cgk were introduced. You want Cg and Cgk to be