H6 investigation: three photos and ten actual samples were received by our quality team for evaluation.From the returned photos, a hole in the top web was observed.In four of the ten returned samples, a hole can be observed in the top web.A review of the internal manufacturing device records and raw material history files for the reported lot numbers was performed and no recorded quality problems or rejections to this incident were found.The secondary process was reviewed.There are four locations where this nonconformance might have occured.Simulations were performed on the four locations.The first simulation was performed on the stopper and found that if the stopper was hit on the blister pack, the duplicated sample does not match the returned sample as the contact point does not match.The second simulation was performed on the flipper plate and found that in the event of two blister packs are stacked at an inclined position, there is a possibility to cause package damage like the complaint photo, however there is a low possibility to have this occurance.The third simulation was performed on the vacuum suction cup, and found that the suction cup is made by rubber hence does not duplicate the damage point.The fourth simulation was also performed on the vacuum suction cup, this suction cup comes in contact with the bottom web, and also does not duplicate the damage point.Based on the simulation, if there are stoppageds at either location three or four, the associates remove the parts from the station and manually puts it back on the conveyor belt before loading to the flipper plate at location two, there is a chance of causing a double stack of blister packs.The current controls in place to prevent this nonconformance include a sensor to detect the moving of a part, the stopper will be triggered and activated, visual inspection and water leak tests are performed hourly to check for damaged packages, an hourly in-process inspection is performed, and a water leakage test and visual inspection is performed during outgoing inspection.The probable root cause of this nonconformance is likely human error.
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