Monitoring Product Size and Edging from Bivariate Profile Data

Profile data consist of the coordinates of points along the edge of the product. Often, several hundred points are involved. Mechanical and automated procedures (e.g., scanning) are used in data gathering. The large data dimensionality presents challenges in the development of control charts to monitor product profiles. The data also show strong cross-correlations between points close to one another. In this article, using the leading principal …