Special Characteristics Agreement

Let`s follow this evolution from the point of view of the particular characteristics. Listeners ask for specific features that need to be taken up by Design-FMEA in Process-FMEA. For mechanical engineering, I found many examples and I understood this approach. But I`m working on FMEAs electro-design, and no one could tell me what the particular features were. Do you have any clues for me? In EE, component design characteristics are defined by the components we use, and these components have unique part numbers. Thus, the functions are determined by the design and the process cannot do anything about it. On the other hand, the most important functions are 100% tested anyway, so there is nothing special. Keep your example: we would choose the rated voltage according to the design and design team, who would also choose a heating switch that would meet these requirements. Thus, in our drawing, the heating switch is already defined by a room number. For production, they must of course use the right heating switch with the right room number. But my question is: what is the peculiarity of the production? You must use the component specified by the design. Hello Carl, even if the FMEA team wants to assume that the incoming fast-connection device meets the specifications, could it be a good idea to draw particular features and show them in the PFMEA in order to draw the attention of downstream users to the peculiarities of certain features? This can help avoid things like the quick connection that is installed by inserting a tool into the critical ID and using that identifier to rotate or move the part in place.

Supplier components can arrive in the specifications, but if they are mistreated due to a lack of awareness, they can be damaged. A special product feature for the rapid connection of Supplier B is the “inner diameter of the connection device.” Supplier B would make it a particular feature of the product and identify the specific characteristics of the process needed to control the inner diameter during the rapid manufacturing process. As you say, these specific features are addressed in the DFMEA plan and supplier control. The final rapid connection product must meet the measurement and power specifications before being shipped to Company A for fuel system assembly. If Company A is concerned about this specific characteristic of the product (the inner diameter of the connection device) and decides to make an exception to the assumptions relating to this detailed part, it may consider modifying its assembly process to reflect this exception. Changes may include measuring the inner diameter or modifying process controls to detect and record variations in the inner diameter. You can also recommend measures that improve the quality of Provider B`s fast-connection device. In addition, they may require the design team to consider that the changes to the fuel support group design are more robust for the expected variation in the rapid connection inside the diameter.

Great question! After completing a number of DFMEA electrical projects that offer candidates significant product characteristics, here`s what I can say. The key to determining the appropriate significant product characteristic when using DFMEA for each electrical mechanical element is the correct description of the cause as a potential design defect. Here`s an example. In the case of a thermostatic-controlled heat switch, a cause of the “switch stays open” mode is “undervalued for required use (estimated at 30 V DC in a 65 V DC application).” The corresponding feature is the “switch voltage.” The FMEA process should ensure compliance with this particular feature, either by controlling the heating switch manufacturing process or in the case of an assembly installation, by ensuring that the incoming part meets this particular requirement.

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