Manufacturing Part Quality is the risk of a delivered product form a supplier not fuctioning during final assembly in case of a machine builder until first year of use at the customer. Risk are comming from vendor parts which are not perfect and cause a failure in the future. Manufactured products are starting with a material and transformed into a part based on a technical product description either from a drawing or a electronical file(s). Again with the processes used to make a manufactured part a failure can occur (yield) which again, when not tested properly, wind up as a failure in the part. Assembled products are the sum of failures from all parts and processes used to make the product. Not all part and process failures lead to a failure in the final product.
The method folllowed to determine the product failre rate is based on a BoM (Bill of Material). Out of the BoM a mflow is created. This can be done from the first publisched BoM or the Volume BoM. The most effective way to work is to start during the design phase where the found yields issues can be tested. Negative tested parts are in principle scrap. In most cases a rework can be done to try to repair the failure.
To make the results tangeble a method is developed where a mflow is transferred to a Value Stream Map where the part and process yield, test slip, rework and rework slip are added to the seperate parts and processes. This is calculated based on a model developed by the Movip project resulting in a Manufacturing Part Quality. This failure will manifest itself during the first year. Unknown is which failure at what time will occur. This method works only when the used added data (yield, test slip) are based on underpinned part and process data.