WorksheetsMeasurement System Analysis
Total questions: 15
Worksheet time: 15mins
True value is
Any device used to obtain measurement
‘Actual’ measure (unknown and unknownable) of the part. Used as the best approximation of this value.
Value of smallest graduation on the scale
Variation can be mathematically measured by
Single deviation
Denominator
Standard deviation
Bias is
Total variation in the measurements on a single characteristic of a master/part, obtained with the same measurement system and over an extended time period
Deviation of the average of the measurement from the true value/reference value
Change throughout the expected operation range of the equipment
Which statement best describes reproducibility
variation observed when same operator measures the same part repeatedly with the same device
variation due to measuring device
variation observed when different operators measure the same parts using the same device
Guidelines for acceptance of GR&R
< 50%
< 10%
< 40%
XDIFF is the maximum average appraiser difference, this value is calculated when measuring
Repeatability
Linearity
Reproducibility
A general rule of thumb is that values of kappa greater than 0.65 indicates good to excellent agreement
False
True
Total variation in the measurements on a single characteristic of a master/part, obtained with the same Measurement System and over an extended time period is the definition for
Stability
Discrimination
Linearity
Value of smallest graduation on the scale best describes
Bias
Discrimination
Measurement
Stability measurements help to
establish whether bias exist
establish how the instrument perform over time
establish whether the instrument is working or not
estabish whether the instrument is behaving linearly
The data from the a measurement is as follows : 2.13, 2.34, 2.45, 2.20,2.10.
What is the range of the measurement?
0.35
0.03
0.10
0.13
The results of a measurement by operators A and B are represent by the curves given. Whic if the following statements are true.
Operator A provides better repeatability
Both operators provide the same repeatability
Operator A provides better repeatability
None of the above
If α = 0.01, the confidence level is
90%
100%
95%
99%
In the diagram shown, the red dots are the measurement values. Which diagram indicates the measurement has bias.
A
B
neither
both
What is the meaning of linearity of a measurement system?
There is no such term used in describing a measurement system
How much difference in standard deviation across all sizes of the part being measured
How much difference in bias across all sizes of the part being measured.
How much difference in mean across all sizes of the part being measured.
