Based on your request for a report on ASME PTC 19.1, it is important to first clarify the nature of this document.
ASME PTC 19.1: The Definitive Guide to Test Uncertainty In the world of high-stakes engineering, "close enough" is rarely sufficient. Whether you are validating the efficiency of a massive gas turbine or testing the power output of a solar farm, your results are only as good as the confidence you have in them. This is where the ASME PTC 19.1 - Test Uncertainty standard becomes essential. asme ptc 191 pdf
The ASME Performance Test Codes (PTCs) provide uniform rules for testing mechanical equipment. While other codes focus on specific hardware (like PTC 22 for gas turbines), PTC 19.1 is a "supplement" that provides the mathematical framework for uncertainty analysis across all performance tests. Based on your request for a report on ASME PTC 19
of how much a test result might deviate from its "true value"—which is theoretically unknowable—within a specific confidence level, usually Key Pillars of Measurement Uncertainty usually Key Pillars of Measurement Uncertainty
This is the "fixed" error. If your ruler is slightly too short, every measurement you take with it will be wrong by the same amount. You can’t average this error away by taking more measurements. PTC 19.1 guides you on how to estimate these limits based on calibration data, manufacturer specs, or engineering judgment.
This is the "scatter." If you measure the temperature of a bath ten times, you will likely get ten slightly different readings due to noise, vibration, or human factors. PTC 19.1 uses statistical methods (standard deviation) to quantify this scatter.