Metrological Document
Formal guide providing the standardized procedure for evaluating and expressing the uncertainty of a measurement. Creating a jcgm 100 uncertainty budget involves identifying every potential source of error from the sensor itself to the environmental conditions in the laboratory. The document establishes a common language for metrologists worldwide.
Statistical Method
Calculating the combined standard uncertainty requires the root sum square of all individual components. Following the jcgm 100 uncertainty budget framework ensures that both Type A evaluations based on statistical data and Type B evaluations based on expert judgement are handled consistently. Probability distributions like the rectangular or normal distribution are assigned to each influence factor.
Each component is weighted by its sensitivity coefficient to determine its impact on the final result.
Traceability Chain
Reports that lack a detailed breakdown of the error sources are often insufficient for high precision applications. A jcgm 100 uncertainty budget provides the evidence needed to claim that a measurement is traceable to international standards.
Verification Process
Accreditation bodies review these calculations during audits to ensure the laboratory operates within its claimed capability. If the jcgm 100 uncertainty budget ignores a substantial thermal or electrical interference, the reported accuracy will be invalid. The final result is usually presented as an expanded uncertainty with a specific coverage factor.
