Intermediate precision definition

The determination of precision can divided into three categories, namely repeatability, intermediate precision, and reproducibility. Repeatability, or intraassay within-day precision, is determined when the analysis is performed in one laboratory by one analyst, using one definite piece of equipment, and is performed within one working day. Intermediate precision is obtained when the analysis is performed within a single laboratory by different analysts over a number days or weeks, using different equipment, reagents, and columns. Reproducibility represents the... 

Two types of precision are usually distinguished, namely the repeatability and the reproducibility. Repeatability is the precision obtained in the best possible circumstances (same analyst, one instrument, within one day when possible) and reproducibility under the most adverse possible circumstances (different laboratories, different analysts, different instruments, longer periods of time, etc.). Reproducibility can be determined only with interlaboratory experiments. Intermediate situations may and do occur. They are for instance defined in terms of M-factor-different intermediate precision measures, where M is one, two, three or even higher [8,9]. In this definition M refers to the number of factors that are varied to make the estimation. The most likely factors to be varied are time, analyst and instrument. According to this terminology, one estimates e.g. the time-and-analyst-different intermediate precision measure (M=2), when the precision is determined by measuring a sample over a longer period of time in one laboratory by two analysts with one instrument. 

Intermediate Precision. ICH definition Intermediate precision expresses, within laboratories variations, different days, different analysts, different equipment, and... 

Intermediate precision. Intermediate precision expresses within-laboratories variations different days, different analysts, different equipment, etc. [13]. The ISO definition used the term M-factor different intermediate precision , where the M-factor expresses how many and which factors (time, calibration, operator, equipment or combinations of those) differ between successive determinations [17]. In a strict sense, intermediate precision is... 

A wide range of chemicals, especially those found among environmental pollutants, can react with DNA or be metabolized to reactive intermediates, producing so-called bulky chemical DNA damage. While the precise definition of bulky is... 

As the intermediates and products were not physically or chemically characterized, their precise definitions are omitted to avoid introducing arbitrary terms. The reaction scheme reveals a similarity between intermediate and the bitumen in oil shale (B). Intermediate 2 could be associated with bitumen generated by the thermal treatment of oil shale, which pyrolyses at lower temperatures in the same way as the bitumen originally present in oil shale. This is indicated by the almost identical activation energies obtained by TGA analysis. 

Definition Measurement precision under a set of intermediate precision conditions of measurement (Figure 7.3). 

Fig. 6. A fault tree for the pumped storage example of Figure 5. For a real system the tank and pump failures would be more precisely defined, or set as intermediate events having further definition by subsequent basic events and more detailed failure modes.

There is definite evidence that ions, electrons, free radicals and excited molecules are produced in systems exposed to ionising radiation. Qualitatively, it has been possible precisely to identify some of these intermediates in selected systems. Quantitatively it has been possible to separate out the yields arising from each of these products in only a limited number of systems and much more work needs to be done. More information is also desirable on the inter-relationship of these species in a particular system. A vast amount of kinetic data characterising some of these intermediates has also been accumulated. 

ISO 5725—Accuracy (trueness and precision) of measurement methods and results ISO 5725-1 1994 General principles and definitions ISO 5725-2 1994 Basic method for the determination of repeatability and reproducibility of a standard measurement method ISO 5725-3 1994 Intermediate measures of the precision of a standard measurement method ISO 5725-4 1994 Basic methods for the determination of the trueness of a standard measurement method ISO 5725-5 1998 Alternative methods for the determination of the precision of a standard measurement method ISO 5725-6 1994 Use in practice of accuracy values... 

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