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Title: Special Topics In Uncertainly Calculation
Author: Philip Stein
Source: 2002 Measurement Science Conference
Year Published: 2002
Abstract: By now, the majority of practitioners in the measurement science community should know the basics of calculating measurement uncertainty according to the GUM. Some issues remain conceptually difficult, such as how to deal correctly with correlated influence quantities, but simplifying shortcuts have largely bypassed the need for rigor here. Still, some issues linger, including some that seem simple or obvious, but maybe theyre not. The speaker(s) will discuss the proper way to calculate and report uncertainty due to limited resolution of the measuring instrument, including subtle issues such as differential nonlinearity of embedded electronic digitizers. Repeatability and reproducibility studies will be discussed with emphasis on how best to design them and how to correctly analyze and report the data that result. Finally, the speaker will elucidate the fine points of measurement assurance, showing how the use of check standards and control charts can make uncertainty budgeting and calculating much simpler while at the same time providing a powerful context for continual improvement of the measurement process, and will demonstrate a complete uncertainty calculation based on measurement assurance results.

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