Which of the following is NOT typically included in an uncertainty budget?

An uncertainty budget is a structured framework used to quantify the uncertainty associated with measurements or calibration processes. It typically includes all relevant sources of uncertainty, which can be classified into various categories such as environmental conditions, process variations, and standard uncertainties.

Subjective assessments, on the other hand, are not usually part of an uncertainty budget because they do not provide quantifiable or objective measures that can be systematically evaluated. Instead, uncertainty budgets rely on measurable and quantifiable factors, ensuring that each source of uncertainty can be analyzed in terms of its contribution to the overall measurement uncertainty.

Environmental conditions account for factors like temperature and humidity that can affect measurements, while process variations encompass the inherent variability in the measurement system or procedure. Standard uncertainties are the known uncertainties associated with standard reference materials or measurement processes. These are all critical components that contribute to the accuracy and reliability of measurements, making them integral parts of the uncertainty budget.