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Development of a PT National Average
Oral Presentation
Prepared by M. Sica
ANSI/ASQ National Accreditation Board, 29 Rogers Road, Vassalboro, ME, 04989
Contact Information: msica@anab-aclass.org; 207-624-1532
ABSTRACT
It has been 15 years (1997) since the USEPA has directly operated the drinking water and waste water PT programs. At that time , it was rather straight forward to calculate national averages of laboratory performance. Essentially, their data set included all the participants. Today, it is a somewhat more complicated as there are more analytes, matrices, providers and more than one data complicating the issue. Within the NELAC-TNI program there are 2 PTPA's pooling data . This report will analyze the values from ACLASS - PTPA which holds data for 3 major PT providers (Absolute Standards, Inc., NSI, RTC-Sigma Aldrich. The database schema, calculations and ways to improve the model will be discussed. Finally, oversight benefits to the NELAC-TNI program will be shown.
Oral Presentation
Prepared by M. Sica
ANSI/ASQ National Accreditation Board, 29 Rogers Road, Vassalboro, ME, 04989
Contact Information: msica@anab-aclass.org; 207-624-1532
ABSTRACT
It has been 15 years (1997) since the USEPA has directly operated the drinking water and waste water PT programs. At that time , it was rather straight forward to calculate national averages of laboratory performance. Essentially, their data set included all the participants. Today, it is a somewhat more complicated as there are more analytes, matrices, providers and more than one data complicating the issue. Within the NELAC-TNI program there are 2 PTPA's pooling data . This report will analyze the values from ACLASS - PTPA which holds data for 3 major PT providers (Absolute Standards, Inc., NSI, RTC-Sigma Aldrich. The database schema, calculations and ways to improve the model will be discussed. Finally, oversight benefits to the NELAC-TNI program will be shown.