ASME PTC 19.1 is the American Society of Mechanical Engineers' standard for Test Uncertainty
ASME PTC 19.1-2018 (reaffirmed 2024) establishes standardized procedures for evaluating and reporting test uncertainty, crucial for assessing data reliability in mechanical engineering. The standard covers Type A and Type B uncertainty quantification, systematic and random errors, and the propagation of errors to determine overall test result confidence levels. The official document is available through the ASME Standards Store and ANSI. PTC 19.1 - Test Uncertainty - ASME asme ptc 191 pdf
Note: While ASME PTC 19.1 is based on the ISO Guide to the Expression of Uncertainty in Measurement (GUM), it is tailored specifically for the practical needs of performance testing engineers. ASME PTC 19
Evaluated using statistical analysis of series of observations (e.g., standard deviation of a sample). PTC 19
$$U = \pm \sqrtB^2 + (t \times S)^2$$