Measuring defects - Forecasting a roll's points during fabric inspection

For each roll, ConductVision Textile is designed to forecast the points the roll is likely to end with, as a range, and the chance it ends over your buyer's limit.

Your inspector reads the forecast and decides the roll's grade.

A mill can track its defects over time on control charts. A c chart follows the number of defects, and a u chart follows defects per unit, "the average number of nonconformities per unit of product" ¹. Both count defects, while points also weigh each defect by its size.

One study charted the defects from 10 circular knitting machines on u charts, by machine and by defect type, so a rise could be traced to one machine or one kind of defect ². Another inspected a weaving mill's greige fabric for three weeks after weaving and ranked its defects with a Pareto analysis, which puts the most frequent first ³.

Points per 100 square yards, or per 100 square metres, already put rolls of different lengths and widths on one scale.

ConductVision Textile is designed to flag each defect with its place on the roll, its size, its points and a still image. Your inspector names the defect and confirms or dismisses it.

For each roll it is designed to give the running points, as a total and over the area inspected, the forecast, and the roll inspection report.