I ran into this one recently. Supplier quoted industry tolerances which were not as tight as our print. They submitted PPAP saying they could not meet our print but could meet the industry tolerance they quoted. Quality (my) department rejected the PPAP for not matching print. Pi#@ing match ensued about forcing the supplier to comply
or changing our print. Ended up changin our print.
It is poor design & development processes that let this stuff happen. If it was done right up front the prints would be set to match what is needed, feasible and cost effective. It should be taken care of long before PPAP.
It is poor design & development processes that let this stuff happen. If it was done right up front the prints would be set to match what is needed, feasible and cost effective. It should be taken care of long before PPAP.
Usually, in my consulting practice, I see customers and suppliers who really work hard on getting the capability issue ironed out and then omit the capacity issue - often suppliers accept quantities and delivery dates they are incapable of meeting. Both capability and capacity are important issues and should ALWAYS be considered and addressed by BOTH supplier and customer. Mistakes in estimating either happen, but most often they weren't given much weight in the decision (most often, one or both of the parties was distracted by PRICE!)