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File name : CBM_SR285,A_HDBSR285T19_English.doc
version : 2010/04/26
Σ
x
2
or
Σ
y
2
Sum of all x
2
values or y
2
values
Σ
x y
Sum of (x z y) for all x-y pairs
Process capability
Step : ( See Example 53~54. )
1. Press [ DATA ] and there are three menus :
DATA–INPUT
,
LIMIT
–
SET
,
DISTR
. Please select
LIMIT
–
SET
and press
[
].
2. Enter an upper spec. limit value (
X USL
or
Y USL
), then
press [
].
3. Enter a lower spec. limit value (
X LSL
or
Y LSL
), then
press [
].
4. Enter the datasets you want under
DATA–INPUT
mode.
5. Press [ 2nd ] [ STATVAR ] and scroll through the statistical
results menu by [
] or [
] to find out process capability
variables you want. ( See table below )
Variable Meaning
Cax
or
Cay
Capability accuracy of the x values or y values
,
Cpx
or
Cpy
Potential capability precision of the x values or y
values,
,
Cpkx
or
Cpky
Minimum (C
PU
, C
PL
) of the x values or y values,
where C
PU
is upper spec. limit of capability
precision and C
PL
is lower spec. limit of
capability precision
C
pkx
= Min (C
PUX
, C
PLX
) = C
px
(1 – C
ax
)
C
pky
= Min (C
PUY
, C
PLY
) = C
py
(1 – C
ay
)
(Note) : When calculating process capability in
2–VAR mode, the
x
n
and y
n
are independent with each other.
Probability distribution
Step : ( See Example 55. )
1. Based on the datasets in
1–VAR
mode, press [ DATA ] and
there are three menu :
DATA
–
INPUT
,
LIMI
T
–
SET
,
DISTR
.
Please choose
DISTR
and press [ ].
2. Enter a
a
x
value, then press [ ].
3. Press [ STATVAR ] and scroll through the statistical results
menu by [
] or [
] to find out probability distribution
variables you want. (See table below)