IPhone X is due to hit the market in November 2017. It seems that there are some production issues that may cause a delay. Take some time to read about the latest news on this issue that can affect iPhone's launch and revenue. I've listed some articles to start. You may read more, but please provide any additional sources in your response.
Answer the below questions:
1-What is the production issue?
2-How is purchasing affected? Can purchasing take any fault in this issue?
3-Look at the Steps in the Supply Process and tell me what may have gone wrong.
4-How can purchasing support, or help fix this issue?
5-How is the entire supply chain affected?