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In This Section |
A random deviation from the laboratory mean. "Expected" or "acceptable" random error is generally between ±3SD of the mean. A deviation greater than ±3SD is considered "unacceptable" random error. Because of its random nature, this type of error is unpredictable.
The difference between the largest and the smallest observed value of a quantitative characteristic or statistical limit.
A SPC rule with a status of reject. When a data point violates a SPC rule with a reject status, the point is not accepted and is excluded from monthly and cumulative statistics and is not reported to the Unity™ Interlaboratory Program for consensus group comparison.
A set of QC values Unity Real Time™ online groups together for statistical profile rule evaluation (for example, within run and between run).