I think that is the easy way to answer that question. Obviously the first "What if .." should be try to source from somewhere else, or perhaps have multiple supply chains. For instance cloth is a commodity, and if they know they can get the quality they need from multiple vendors on all 7 continents - they don't need to do much except perhaps validate the supply chain of some selected to ensure they don't source from the same place. But if they are using a particular mineral that is only available from one location, something else must obviously be done.
Just stockpiling is not really an answer as much as it's trying to just do the least amount of problem solving and thinking.
Just stockpiling is not really an answer as much as it's trying to just do the least amount of problem solving and thinking.