The QMSys GUM program is used to analyze the uncertainty of physical measurements and calibrations. The analysis and computations follow the rules of the official documentations: - ISO Guide to the expression of uncertainty in measurement - EA-4/02 Expression of the Uncertainty of Measurement in Calibration - DKD-3 Angabe der Messunsicherheit bei Kalibrierungen - EURACHEM/CITAC Guide, Quantifying Uncertainty in Analytical Measurement - ANSI/NCSL Z540.2 - U.S. Guide to the Expression of Uncertainty in Measurement. The software uses the uncertainty propagation (GUM) method to calculate the measurement uncertainty. The most important features offer: - Suitably for linear models - Max. 10 input and 1 output quantities - Distributions: Normal, Lognormal, Student?s t, Rectangular, Triangular, Trapezoidal, curvilinear Trapezoidal, U-shaped, Quadratic, Exponential, Cosine, 1/2 Cosine - Direct and indirect methods of observation - Statistical evaluation of Typ A quantities This software is designed for educational purposes and is distributed free of charge.