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標(biāo)準(zhǔn)號(hào): BS ISO 21748:2017
發(fā)布: 2017年
總頁數(shù): 52頁
發(fā)布單位: 英國標(biāo)準(zhǔn)學(xué)會(huì)
當(dāng)前最新: BS ISO 21748:2017

引用標(biāo)準(zhǔn): I ISO 10576-1:2003 ISO 11648-2:2001 ISO 3534-1:2006 ISO 3534-2:2006 ISO 3534-3:2013 ISO 5725-3:1994 ISO 5725-5:1998 ISO 7870-2:2013 ISO GUIDE 33:2000 ISO/IEC 17025:2005 ISO/IEC 17043:2010 ISO/IEC GUIDE 99:2007
被代替標(biāo)準(zhǔn): BS ISO 21748:2010

本體: 再現(xiàn)性重復(fù)性

適用范圍: This document gives guidance for — evaluation of measurement uncertainties using data obtained from studies conducted in accordance with ISO 5725-2, and — comparison of collaborative study results with measurement uncertainty (MU) obtained using formal principles of uncertainty propagation (see Clause 14). ISO 5725-3 provides additional models for studies of intermediate precision. However, while the same general approach may be applied to the use of such extended models, uncertainty evaluation using these models is not incorporated in this document. This document is applicable to all measurement and test fields where an uncertainty associated with a result has to be determined. This document does not describe the application of repeatability data in the absence of reproducibility data. This document assumes that recognized, non-negligible systematic effects are corrected, either by applying a numerical correction as part of the method of measurement, or by investigation and removal of the cause of the effect. The recommendations in this document are primarily for guidance. It is recognized that while the recommendations presented do form a valid approach to the evaluation of uncertainty for many purposes, it is also possible to adopt other suitable approaches. In general, references to measurement results, methods and processes in this document are normally understood to apply also to testing results, methods and processes.

術(shù)語	描述
偏差 bias	測試結(jié)果或測量結(jié)果的期望與真實(shí)值之間的差異
組合標(biāo)準(zhǔn)不確定度 combined standard uncertainty	測量結(jié)果的標(biāo)準(zhǔn)不確定度，當(dāng)該結(jié)果是從多個(gè)其他量的值獲得時(shí)，等于這些量的方差或協(xié)方差之和的正平方根，根據(jù)測量結(jié)果隨這些量的變化而變化的情況進(jìn)行加權(quán)
覆蓋因子 coverage factor	用作組合標(biāo)準(zhǔn)不確定度的乘數(shù)，以獲得擴(kuò)展不確定度的數(shù)值因子
擴(kuò)展不確定度 expanded uncertainty	定義一個(gè)區(qū)間關(guān)于測量結(jié)果的量，預(yù)期包含可以合理地歸因于被測量的值的分布的大部分
精密度 precision	在規(guī)定條件下獲得的獨(dú)立測試/測量結(jié)果之間的一致程度

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