Donnell Charles, Manager Proficiency Testing Programs, USP, Brand Insights Contributor | Authors

Donnell Charles is the Sr. Manager Proficiency Testing Programs at USP directing the development of the USP PT program and coordinating the PT studies with NSI Lab Solutions.


Passing the Test: Understanding Proficiency Testing

Laboratories use proficiency tests (PTs) to comply with their accreditation requirements and evaluate analysts’ performance. Laboratories regard PTs as a burdensome chore that must be successfully completed to satisfy internal or external compliance or accreditation requirements. PTs are an integral part of a quality management system (QMS) under quality assurance and control (QA/AC). Understanding the core components of the QMS is an important part of passing any PT test. Unacceptable PT results may have little to do with the result itself but reflect the use and application of statistics, standards, and methods.