Fault Analysis
The decision model is based on universal defect classes of known and unknown disturbances or faults. Known faults can easily be identified through the evaluation of error statistics. These faults can be generalised and assigned to universal defect classes. Unknown faults can be identified by the Failure Mode and Effects Analysis. The results of the analysis can also be generalised and assigned to the defect classes. For example, the fault: “Fail of an air valve at machining centre 1” could be generalised to “Fail at machining centre 1” and via several layers to “resource fault”. Further classes are “Material faults” or “Job faults”.