Multirule QC uses a combination of decision criteria, or control rules, to decide whether an analyticalrun is in-control or out-of-control. The well-known Westgard multirule QC procedure …

1-2s. The 1 2s rule is usually a warning rule violated when a single control observation is outside the ±2SD limit. Some laboratories consider any quality control value outside its ±2SD limit to …

Rule 1-2s Definition: The 1-2s Control Rule indicates one control result has exceeded the established mean +/- 2SD range. This is a “warning rule,” which does not indicate an “out-of …

Rule: 1-2s: one control value has exceeded the mean by more than 2 SD but less than 3 SD (so this point would lie between the 95% and 99% confidence level). This control value may be …

2016年7月20日 · The rule is called a Repeat 1:2s QC Rule, where 1:2s designates that the “run” is rejected when a single control is out 2 standard deviations (2s). This helps improve the …

2020年2月18日 · A 1:3s or R:4s violation is likely to be caused by a random error. A 2:2s, or 4:1s, or 8:x is likely to be caused by a systematic error. The "Westgard Rules" are not omnipotent - …

2 2s rule: This rule applies when two consecutive results exceed the +2 or the -2 standard deviation limit. The controls could be normal or abnormal (across runs) or one of each (within …

2 2s indicates a rejection when two consecutive control values exceed the same mean +2s limit or the same mean -2s control limit; this rule is sensitive to shifts in the mean of the distribution, …

The error detection rates for the repeat-sampling strategies approached those of the 1:2s QC rule for moderate to large out-of-control error conditions. In most cases, the power of the repeat …

2012年5月1日 · Should I Repeat My 1:2s QC Rejection? Repeating a QC that is outside 2SD from the mean (1:2s rule) appears to be a common practice. Although this form of repeat sampling …