可能需要分清楚:OOS,OOT,OOE,异常事件(atypica),偏差(deviation)等几个定义:
我个人的理解,希望指正:1、OOS,偏差两者应该比较清楚,都是对已有规定的偏离,有的人将OOS定义为偏差中的一种特殊情况(针对检测结果),应该是可以理解的;
2、如果没有书面规定,但是又认为是一种异常,那么可以定义为异常事件。
3、OOE主要是可能针对于检测的变异性来说的(比如RSD)超常,但是检测结果均在标准(specification)范围内,标准是相对固定的。
4、OOT主要是统计意义上的,具体标准相对于不是固定的,是随着数据进行调整的,比如SPC中西屋规则判定。
What is the difference between OOS / OOE / OOT?
Out-of-Specification (OOS) Results
A result that falls outside established acceptance criteria which have been established in official compendia and/or by company documentation.
Out-of-Expectation (OOE) Results
An atypical, aberrant or anomalous result within a series of results obtained over a short period of time is an OOE result. An OOE result is a result that meets specifications, but is outside the expected variability of the analytical procedure. Out of Trend (OOT) Results
A time dependent result which falls outside a prediction interval or fails a statistical process control criterion.
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