Method for analysing quality deficiencies

A method for analyzing surface imperfections of workpieces, preferably of vehicle bodies and/or vehicle attachment parts, in particular after and/or whilst passing through a production process in industrial-method plants, preferably after and/or whilst passing through a painting process in painting plants, the method comprising:

• creating a workpiece-specific data set, uniquely assigned to a workpiece, at a start of a production process, in particular at the start of a painting process, and/or creating a workpiece-carrier-specific data set, uniquely assigned to a workpiece carrier, at the start of a production process, in particular at the start of a painting process;
• supplementing the workpiece-specific data set while a workpiece is passing through the production process, in particular the painting process, with in particular quality-relevant process data and/or supplementing the workpiece-carrier-specific data set while a workpiece carrier is passing through the production process, in particular the painting process, with in particular quality-relevant process data;
• and
• storing the workpiece-specific data set in a database and/or storing the workpiece-carrier-specific data set in a database,
• wherein the workpiece-specific data set and/or the workpiece-carrier-specific data set is supplemented with quality data that contains information about surface imperfections of the particular workpiece, preferably at an end of the production process, in particular at the end of the painting process,
• wherein quality data from a plurality of workpiece-specific data sets and/or from a plurality of workpiece-carrier-specific data sets are automatically classified into different quality deficiency clusters by a cluster method for the detection of systematic surface imperfections, and
• wherein workpieces are ejected from the production process based on the quality deficiency clusters detected by the cluster method.