E – 17
File name : CBM_SR285,A_HDBSR285T19_English.doc
version : 2010/04/26
Σx 2 or Σy 2 Sum of all x 2 values or y 2 values
Σx 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 (CPU, CPL) of the x values or y values,
where CPU is upper spec. limit of capability
precision and CPL 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)