Hi Guys
Thanks for your input ,however our application of DPMO is not to replace fault detection stages eg Inspection, ICT Test, Functional test but in some cases to re-inforce and justify detection stages. DPMO is a simple meausre which is used to identify processes that are not performing to...
Like most manufacturing companies we analyse performance using DPMO ,defect per million opportunities and where defining opportunities is reasonably straight forward in Circuit card assemblies (and defined by IPC) I am finding it difficult to find a similar definition for mechanical assemblies...
ICT testing is better assuming that you have been given good access and the product has been designed for testability. As most PWB assembly plants are aware the highest area or opportunities for defcets are likely to be due to the manufacturing processes themselves and indeed this figure is...