151
Appendix B: Gauge
R&R Forms
FORM B.1
Data Collection
Gauge type: Gauge number: Resolution:
Characteristic: Specication: Total tolerance:
Work cell: Operation number: Characteristic number:
Operator A name: Operator B name: Operator C name:
Operator A Replications Range
Sample
1
2
3
4
5
6
7
8
9
10
Operator
B
Sample
1
2
3
4
5
6
7
8
9
10
Continued
152 • Appendix B: Gauge R&R Forms
FORM B.1 (continued)
Data Collection
Operator
C Replications Range
Sample
1
2
3
4
5
6
7
8
9
10
FORM B.2
GR&R Calculation
1. Gauge type: Gauge number: Resolution:
2. Characteristic: Specication: Total tolerance:
3. Work cell: Operation number: Characteristic number:
4. Operator A name: Operator B name: Operator C name:
5. Average range for
Operator A:
Average range for
Operator B:
Average range for
Operator C:
6. Average measurement
value for Operator A:
Average measurement
value for Operator B:
Average measurement
value for Operator C:
7. Repeatability
R
r
value for 2 operators
Average of all ranges in
line 5 × 4.56 =
____________
Repeatability
R
r
value for 3 operators
Average of all ranges in
line 5 × 3.05 =
____________
Repeatability as % of
tolerance (total tolerance
from line 2)
R/ tolerance × 100 =
____________
8. Reproducibility
Xr value
Xr = Highest value in
line 5 minus lowest
value in line 5
Xr = __
Reproducibility
K factor
If 2 operators, K factor
for line 9 is 3.65
Reproducibility
K factor
If 3 operators, K factor for
line 9 is 2.70
Appendix B: Gauge R&R Forms 153
FORM B.2 (continued)
GR&R Calculation
9. Reproducibility
correction for
repeatability and
sampling, nr value
nr = number of parts ×
number of
measurements per part
____________
Reproducibility
Y =
()
Xr XK
Rr
nr
2
2
Y = ____________
Reproducibility as % of
tolerance
Y/ total tolerance × 100 =
____________
10. Gauge R&R
GR&R =
YR
r
22
+
=
____________
GR&R as % of tolerance
GR&R/ total tolerance ×
100 = ____________
FORM B.3
Gauge Stability Determination
Gauge type: Gauge number: Gauge resolution:
Characteristic: Specication: Total tolerance:
Work cell: Operation number: Characteristic number:
Record one reading per interval for 30 intervals. Intervals may be 1 day, week, or
month depending on gauge use frequency.
1 2 3
4 5 6
7 8 9
10 11 12
13 14 15
16 17 18
19 20 21
22 23 24
25 26 27
28 29 30
Range is maximum minus
minimum
Range =
Stability is range/ total
tolerance × 100
Stability =
If stability is 15% or less of
total tolerance, then
gauge is suciently stable
154 • Appendix B: Gauge R&R Forms
FORM B.4
Gauge Linearity Determination
Gauge type: Gauge number: Gauge resolution:
Characteristic: Specication: Total tolerance:
Work cell: Operation number: Characteristic number:
Divide total measurement range of gauge into 10 equal intervals and measure a known
standard for each interval. Record the deviation from each of the known values.
1 2 3 4 5
6 7 8 9 10
Range is maximum minus
minimum
Range =
Linearity is range/ total
tolerance × 100
Linearity =
If linearity is 15% or less
of total tolerance, then
gauge is suciently
stable

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