JIT- Just in Time, invented in the 1970's by the car maker Toyota is a supply chain model where all the materials from the suppliers arrives the plant just before the starting of production. This is a model which helps you to maintain zero inventory, thereby reducing the costs. Many companies, started adapting this model, thereby relying on a single supplier in a single place for the materials.
When COVID-19 started spreading in china, the electronics supply chain got affected because, china is the hub for electronic suppliers to the world. And, when China recovered, the other parts of the world got affected, and had to close down production plants. Now, firms realises the loophole of JIT and we could see the firms selecting new regional suppliers or adding some inventory to the company, just in case if they need it to be prepared to any situation.
The COVID Pandemic did bring out the flaws of many well planned supply chains. I believe a supply chain during emergency situations too should also be layed out as the number of "Emergencies" keep increasing through the world
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