NIST Uncertainty Machine

Introduction

User's manual available here.

The NIST Uncertainty Machine is a Web-based software application to evaluate the measurement uncertainty associated with an output quantity defined by a measurement model of the form y = f(x₁,...,x_n).

Drop configuration file here or click to upload.

1. Select Inputs & Choose Distributions

Choose and set the correlations if necessary

2. Choose Values

Number of realizations of the output quantity

Cannot exceed 5,000,000

Random number generator seed (selected at random reset button is pressed)

Symmetrical coverage intervals

3. Write the Definition of Output Quantity

Write the definition of the output quantity in a valid R expression