ABFM Quality Control & Process Improvement 3

Question 1

A forensic DNA laboratory's proficiency test result is reported as 'inconclusive' when the correct answer is a full inclusion. This error type is classified as:

Accepted Answer

False negative

Answer

Reporting 'inconclusive' instead of inclusion is a false negative because the correct association was missed.

Question 2

Which ISO/IEC 17025 clause specifically addresses the handling of nonconforming work in testing laboratories?

Accepted Answer

Clause 7.10 (Nonconforming work)

Answer

ISO/IEC 17025:2017 Clause 7.10 requires laboratories to have a procedure for identifying, managing, and disposing of nonconforming work.

Question 3

In measurement uncertainty estimation, the 'Type B' evaluation of uncertainty is based on:

Accepted Answer

Information from calibration certificates, literature, or expert judgment

Answer

Type B uncertainty uses non-statistical information such as manufacturer specifications, calibration data, or published reference values.

Question 4

A forensic laboratory implements a corrective action but the same nonconformance recurs six months later. The MOST likely root cause analysis failure was:

Accepted Answer

Failure to address the true root cause

Answer

Recurrence of a nonconformance indicates the corrective action addressed symptoms rather than the underlying systemic root cause.

Question 5

Which tool visually displays the frequency distribution of data to reveal the shape of a process distribution?

Accepted Answer

Histogram

Answer

A histogram groups data into intervals and displays the frequency of each interval, revealing distribution shape such as normality or skewness.

(ABFM) American Board of Forensic Medicine Certification Practice Test

(ABFM) American Board of Forensic Medicine Certification Practice Test

ABFM Quality Control & Process Improvement 3