ASME PTC 19.1-2018, reaffirmed in 2024, provides the foundational framework for calculating and reporting measurement uncertainty in engineering performance tests. It defines procedures to analyze random and systematic errors, ensuring reliable, standardized data for mechanical systems like turbines. The current standard is available through the ASME website . PTC 19.1 - Test Uncertainty - ASME
Old versions allowed Gross Error detection via historical standard deviation. The 2018 revision clarifies how to handle "outliers" without biasing the data. It explicitly warns against removing data just because it looks bad—you must prove physical cause. asme ptc 191 pdf
