The analyzer failed to aspirate the correct volume of plasma for the test.

You place the CBC label on the green top tube.

The server is down that connects the instrument and the LIS.

You tested the sample for a TSH instead of for a TRH.

You wrote down 1.0 mlg/dl instead of 10.0 mg/dl for the patient result.

The centrifuged jammed and cracked the patient sample.

You forgot to perform QC and reported test results.