buffering supply disruptions with inventory , management homework help

Please read the article in the above link and discuss (as a start) the following:

What is causing the increase in supply backlog for airliner production? What preventive actions were taken by the airplane producers?

2. What are the limitations that airplane producers have for buffering supply disruptions with inventory?

3. Why do airline producers source products from a variety of global locations and suppliers? What complexity does this cause?

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