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It is essential that causes of inconsistencies are defined in details because this assures a proper FMEA analysis. Often it is difficult to state which parameters/machines/external factors may cause a specific inconsistency.
One of the significant methods adopted in quality management systems in order to search for causes is DOE (Design of Experiments), that is experimental planning stipulated in the IATF 16949 standard. This is an advanced statistical method and also a manufacturing process improvement instrument.
DOE’s strong point is that it does not require trials for all possible process settings. This method relies on various statistical methods and allows limiting the number of required trials, and for this reason reduces their costs and time required for conducting them.
The use of DOE is thus a form of searching for causes which bases on experiments, often may result in essential conclusions regarding a specific process and consequently may help you identify causes of inconsistency, supporting risk analysis with the use of FMEA method.
For more details on DOE, please attend training held by our partner – PROQUAL. The training puts a considerable emphasis on practice and exercises.
