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Cpx or Cpy
Cpkx or Cpky
ppm
Note: When calculating process capability in 2-VAR mode, the x
values are independent of each other.
Correcting Statistical Data
See Example 45.
1.
Press [ DATA ].
2.
To change the data, select DATA-INPUT. To change the upper or lower
spec. limit, select LIMIT. To change a
3.
Press [
] to scroll through the data until the entry you want to
change is displayed.
4.
Enter the new data. The new data you enter overwrites the old entry.
5.
Press [
] or [
Note: The statistical data you enter is retained when you exit statistics mode.
To clear the data, select D-CL mode.
Probability Distribution (1-Var Data)
See Example 46.
1.
Press [ DATA ] , select DISTR and press [
2.
Enter a a
value, then press [
x
3.
Press [ 2nd ] [ STATVAR ].
4.
Press [
] or [
the probability distribution variables you want (see table below).
Variable
t
P(t)
Potential capability precision of the x values or y values,
,
Minimum (CPU, CPL) of the x values or y values, where
CPU is the upper spec. limit of capability precision and
CPL is lower spec. limit of capability precision.
C
= Min (C
pkx
PUX
C
= Min (C
, C
pky
PUY
Parts per million, Defection Per Million Opportunities.
] to save the change.
] to scroll through the statistical results until you find
Meaning
Test value
The cumulative fraction of the standard normal
distribution that is less than t.
E-23
,
, C
) = C
(1–C
PLX
px
) = C
(1–C
PLY
py
ay
, select DISTR.
x
].
].
)
ax
)
and y
n
n
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