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Was the OOS data calculated correctly?
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YES
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Is equipment adequately calibrated for sensitivity and accuracy?
|
YES
|
Are solutions and reagents prepared incorrectly, and/or degraded?
|
NO
|
Are personnel carrying out test method correctly?
|
YES
|
Perform full-blown OOS investigation.
|
|
Confirm analyst understands appropriate calculation methods
|
|
Calibrate equipment, and retest sample.
|
|
Discard problematic solutions/reagents. Prepare fresh solutions, and retest.
|
|
Retrain personnel for adequate method.
|
| |
OOS
