# Measurement result

The **measurement result** is the approximate value for the true value of the measured variable, which is calculated by evaluating the measured values obtained with a measuring device.

According to DIN 1319 this is:

- The
*measured variable*is*the*physical variable to which the measurement applies.

The required measuring device (or simply the measuring device ) supplies

- the
*measured value*as the special value of the measured variable.

- It must be stated as the product of the numerical value and the unit .

The aim of every measurement is to determine the true value of the measurand. In order to do this, unavoidable measurement deviations must be subtracted: Known systematic deviations through correction; random deviations through the use of statistical methods ( error calculation ).

- The
**complete measurement result**is the estimated value for the true value of a measured variable obtained after the calculation, together with the measurement uncertainty with which the estimated value can be specified.

In many measurement tasks, the variable of interest cannot be measured directly, but must be determined from several measurable variables according to a mathematical relationship. The deviations contained in the measured values of the individual variables are transferred via the formula to the result, which is therefore also subject to a measurement deviation. This process is called error propagation . In order to be able to determine or estimate the deviation of the result, there are calculation rules for error propagation.