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Operating specifications (opspecs)
| Глоссарий по стандартизации, контролю и управлению качеством |
Used here to describe the imprecision and inaccuracy that are allowable and the qc that is necessary to assure, at a stated level, that a defined quality requirement will be achieved in routine operation.
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Imprecision, английский
- “the random dispersion of a set of replicate measurements and/or values expressed quantitatively by a statistic, such as standard deviation or coefficient of variation.” [clsi] ifcc has recommended that the mean value and number of replicates should also be stated, and the experimental design described in such a way that other workers can repeat it. this is particularly important whenever a specific term is used to denote a particular type of imprecision, such as within-run, within-day, day-to-day, total, or between-laboratories.
- Неточность. см. precision (прецизионность).
- Неточность ров частиц, осаждаемых на каждом предметном стекле, зависит от диаметра отверстия и скорости движения газа.
- Неточность. см. precision — точность.
Inaccuracy, английский
- "numerical difference between the mean of a set of replicate measurements and the true value. this difference (positive or negative) may be expressed in the units in which the quantity is measured, or as a percentage of the true value" [ifcc]. we use the term biasmeas to describe the average systematic difference between a measurement procedure and a comparative method and express it in percent on opspecs charts..
- Неточность, погрешность
- Неточность
- Неточность; погрешность
Requirement, английский
- Требование
- Something which is necessary one of the requirements of the position is a qualification in pharmacy. res abbr reticuloendothelial system
- Требование; спрос; потребность; условие ~ of continuity требование (обеспече- 469 requirement ния) неразрывности [неразрезность сплошности] ~s of structural safety требования техники безопасности в строительстве
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Opspecs chart, английский
A plot of the inaccuracy (on the y-axis) and the imprecision (on the x-axis) that are allowable for different qc procedures. the chart is prepared for a defined quality requirement and for a stated level of analytical quality assurance (aqa). readily available in workbook format in the opspecs manual and also easily prepared by the qc validator computer program.
Number of control measurements, n, английский
Used here to indicate the total number of control measurements available for use in assessing the quality of an analytical run. we consider n to be the total number of control measurements available for inspection when using common levey-jennings type qc charts or multirule type qc procedures where it is possible to combine the measurements from different materials to accumulate a higher n (and higher error detection) for evaluating control status. these measurements may be replicates on one level or material, individual measurements on two or more materials, or replicate measurements on two or more materials. for example, if you assay a single material and make two measurements on that material, n is 2. if you assay two materials (as required by us clia regulations) and make single measurements on each, n is 2. if you assay two materials and make duplicate measurements on each, n is 4. if you assay three materials and make single measurements on each, n is 3. if you assay three materials and make duplicate measurements on each, n is 6. with the use of mean/range or cusum type of qc procedures where it is more difficult to combine the measurements from different control materials, n is more likely to be the number of replicates on an individual material.
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