QC Log
Introduction
Quality Control
IMMAGE 800 Operations Manual A11403
Page 9-22
September 2016
QC Log
Introduction
The QC Log displays results from a specified period with interpretations regarding the
relationship between QC results, using the assigned mean and standard deviation.
Data points can be deleted from the hard disk only and the cumulative statistics will
update automatically. The deleted data points are marked as deleted, with the
operator’s initials and the date and time of deletion. The operator may view or print
the QC Log from either the hard disk or the floppy disk. The Action Log within the
QC Log function allows comments to be attached to specific data points.
Description of Symbols on the QC Log
The following table describes the symbols and flags displayed on the QC Log.
Table 9.1
QC Log Symbols and Flags
Symbol/Flag
QC Result Interpretation
Westgard
Rule
Violation
Result and yellow Warning
symbol
Result is > ±2 SD and <± 3 SD from
the assigned mean.
1-2S
Result and red Warning
symbol
Result is > ±3 SD from the assigned
mean.
1-3SD
Result, red Warning symbol
and "Accuracy" flag
Current result and previous result >±2
SD on the same side of the assigned
mean.
2-2S
Result, red Warning symbol
and "Precision" flag
Current result and previous result >±2
SD on the opposite sides of the
assigned mean.
R-4S
Result flagged >± 4S.D.
Result is included in the QC Log and
QC Chart, but is not used to calculate
statistics.
Deleted
QC data point was deleted. The date,
time and operator are displayed
beside the deletion.
*
An Action Log comment is associated
with the data point.