So I’m willing to bet that you are pretty proud of your product. 

You  believe that you are using your product development definition to  provide your customers with a high quality product that can meet their  needs better than any other product that is currently on the market.  This is all fine and good as long as the product that you are delivering  is truly high quality. It can only be high quality if it is built out  of high quality parts. 

What is a product manager to do if they suddenly discover that some of the parts that are going into their product are NOT high quality?