operating characteristic curve


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Fig. 61. Operating characteristic curve.

operating characteristic curve

a line which shows the relationship between the QUALITY of batches of raw materials or components and the probability of accepting any given batch. Fig 61 shows an operating characteristic curve in which the vertical axis represents the probability of accepting a batch of raw materials or components (or the percentage of batches accepted from multiple batches) while the horizontal axis shows the percentage of defective units in a batch or batches of materials or components.

The operating characteristic curve is used as part of an ACCEPTANCE SAMPLING scheme and shows the performance of the sampling plan for any batch quality characteristic.

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Caption: Figure 3: The receiver operating characteristic curve analysis of myoglobin within 4 h of onset of acute myocardial infarction
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Mayer(1967) suggested that the quality standard 'p' can be considered as a quality level, along with certain other conditions to specify an operating characteristic curve later studied by Soundararajan (1975) as the quality level corresponding to the inflection point of the OC curve.
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