Calibration

Precision machines need to be calibrated. Accuracy and precision are not the same thing. Per Wikipedia, Accuracy is how close a given set of measurements (observations or readings) are to their true value. Precision is how close the measurements (observations or readings) are to each other. Accuracy is measured using a series of specific tests under controlled conditions to determine if a specific machine is operating within expected tolerances. Tolerance is an allowed amount of variation from a specified quantity. Tolerances are set and serve as a standard between which results must fall. There are many tests that can help determine the accuracy of a machine; remember that accuracy is not a standalone value, but rather the summation of these specifications. A financial report tells a story. That story must be "true and fair". Precision is the measure of how true and fair that story is to the real economic entity that the story is about. A finan...