This practice establishes essential and recommended procedures for the conduct of quality control for a Psychophysiological Detection of Deception (PDD) examination, or polygraph examinations. The procedures state that all PDD examinations may be subjected to a quality control review. Experienced examiners who are trained in the PDD format utilized by the original examiner are qualified to conduct a quality control review of an examination. A quality control review shall be independent and objective and meet all applicable ASTM standards. The quality control process should involve the review of test data analysis of all charts collected, questions and answers utilized, the PDD report, among others. The person conducting the quality control review shall attest, in writing, as to whether the test data supports the conclusion rendered by the original examiner. All PDD documents and test data shall remain available for a quality control review for no less than a year or until the incident or circumstance requiring the examination to be conducted has been completely adjudicated.