measuring tape
measurement uncertainty a practical guide for secondary dosimetry laboratories iaea tecdoc series no. 1585
a reliable assessment of measurement uncertainty in calibration services is an essential qualitative requirement for any calibration laboratory . while general guidance on the estimation of measurement uncertainty was published by the international standards organization iso in 1995 that guidance lacked a specific focus on dosimetry calibration laboratories . this publication is devoted to the implementation of a common procedure of uncertainty assessment across all secondary standards dosimetry laboratories ssdls . it includes practical examples of the assessment of measurement uncertainty for air kerma and absorbed dose to water calibration for radiotherapy dosimetry . implementation of the procedures recommended in this publication will ensure compliance with the iso requirements and facilitate the review of comparison results in proficiency testing or audits .