1. Was demand (i.e., the customer orders you received) volatile or relatively stable?

2. Was your supplier (i.e., the shipments you received in response to your own orders) reliable?

3. What caused demand volatility or supplier unreliability, if either were significant?

4. Review the various plots for orders and inventory, what three patterns do you see as you "look" up the supply chain? Are these patterns only for your "supply chain" or do they also show up in the plots for other supply chains (i.e., those of your peers)?

5. What factors explain these patterns?

6. Do these factors explain recent supply chain disruptions due to COVID-19?