The results from the calibration of an asset can vary when the asset is measured multiple times. In calibration, the uncertainty measurement helps determine the reliability of the asset by comparing the recorded value to its real value.
Any measurement is subject to imperfections. Some of these imperfections are caused by random effects, such as short-term fluctuations in temperature, humidity, and air-pressure, or variability in the performance of the measurer. Repeated measurements show variation because of these random effects.
Other imperfections are cause by systematic effects. These systematic effects can be the offset of a measuring instrument or a change in its characteristics between calibrations. Other systematic effects can be personal bias in reading an analog scale or the uncertainty of the value of a standard.
The uncertainty measurement data for calibration is calculated externally to Maximo® Calibration. Information about calibration assets is exported from Maximo Calibration to the external system, where the information is calculated to determine the correct uncertainty data. The information is then imported into the calibration data sheet tables and the data sheet work order tables. When a data sheet is attached to a work order, the uncertainty measurement data is imported from the Data Sheet Template application.
You use the Maximo integration framework to link Maximo Calibration to the external system. Before you configure Maximo Calibration for uncertainty data, you must complete the basic configuration tasks to set up your environment. See the information about basic configuration in the IBM® Maximo Asset Management Integration Guide.