Software & Analysis How to Use Risk Evaluation to Develop a PT Participation Plan Pao-Chu Kao, Jia-Fen Cheng, Shu-Fen Chang, Ju-Lin Wei, and Jia-Chi Chen November 7, 2013 In the past, proficiency testing (PT) items and participation frequency were formulated by accreditation bodies, regardless of the scale, customer type, and economic conditions of a laboratory.Read More