Bias
The bias is related to one (or several) systematic error(s). It is important to evaluate the bias in order to put in place corrective measures to prevent it. If this is not possible, it may be necessary to correct the measurement result to account for the estimated bias.
There are two kinds of bias: one related to the measurement method and the other related to the laboratory. Total bias is the sum of these two potential biases.
Systematic error is part of the measurement error which, in repeated measurements, remains constant or varies in a predictable way. Systematic error and its causes may be known or unknown. A correction may be applied to compensate for a known systematic error.
Measurement bias is an estimate of a systematic error.