operating characteristic curve
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operating characteristic curvea 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.