quality control

a degree to which a set of inherent characteristics fulfills requirements (ISO 9001:2008)

part of quality management focused on fulfilling quality requirements (ISO 9000:2000)

part of quality management focused on providing confidence that the quality requirements will be fulfilled (ISO 9000:2000)

set of activities or plan that aims to maintain the highest degree of excellence for the diagnosis and treatment of disease and maintenance of health

establishes norms that must be met

established to offer education of why errors occur; provide a program to remedy defects

established to prove that corrective measures have produced favorable results

extent to which the measurement approximates the true value of the quantity being measured

synonymous with reproducibility → repeated results agree with one another

ability of a method to detect a particular substance without the interference of some other substances present in the sample

ability of a method to detect even the smallest amount of the particular substance tested for

ability of a method to maintain its accuracy and precision over an extended period of time

degree to which the method is easily repeated

Mean = Average ● Measure of central tendency ● Associated with symmetrical or normal distribution

Middle value of the data set, in terms of rank

Most frequent value in the given data set

The average distance of the given data from the mean

Represents the degree of measurement of precision (reproducibility)

Related to precision (values close to one another) and accuracy (closeness of values to the true target value)

Pertains to the dispersion or spread of values around the mean.

It is the percentile expression of the mean

Defined as the measure of relative magnitude of variability of data

Low CV of a given data set implies that there is great precision.

COEFFICIENT OF VARIATION formula