ABL90 FLEX reference manual Appendix – Quality control
I-13
This rule is a warning rule.
Measurement value is
outside the mean 2 SD.
Corrective action: Perform another measurement on a new ampoule
of the same level. If the second result falls within
the control range, then the first result can be
attributed to normal statistical variation.
If the second result is outside the established
mean 2 SD, see section
Quality control
evaluation
further in this appendix.
This rule is applicable to both manual and built-in QC.
This rule is a rejection rule.
Measurement value is
outside the mean 3 SD.
Corrective action: Perform another measurement on a new ampoule
of the same level. If the second result falls within
the control range, then the first result can be
attributed to normal statistical variation.
If the second result is outside the established
mean 2 SD, see section
Quality control
evaluation
further in this appendix.
This rule is applicable to both manual and built-in QC.
This rule is a rejection rule.
Two consecutive
measurements are
outside the mean 2 SD
on the same side of the
mean.
Corrective action: Perform steps described in section
Quality control
evaluation
further in this appendix.
This rule is applicable to both manual and built-in QC.
Rule 1
2s
Rule 1
3s
Rule 2
2s