process and system for the statistical monitoring of industrial processes.

摘要

The method for the control of an industrial process through an electronic processing system associated with a production line includes performing a statistical test ¦ verifying the properties of a group of products obtained through the process, the power of which provides reproducibility/sensitivity information about the test and comprises the operations of: producing a pilot sample including n exemplars of the product obtained through that process, acquiring measured data ( X 1 , ..., X n ) for an observed variable relating to that sample having a distribution F n approximating to the unknown F distribution for the observed variable, determining a minimum sample size on which the test is performed such that the lower bound ( À ^ F n , , l ± 1 ( m ) ) for a confidence interval of predetermined level (1-±1) associated with the bootstrap distribution for the pointwise estimate of the power of the test performed on a sample of that size extracted from the pilot sample of distribution F n , is equal to or greater than a predetermined desired power value, and producing a sample of products to be subjected to that ¦ test including m exemplars equal to the sample size determined, where the outcome of the test determines control of the process in accordance with a predetermined criterion.