$$The just$-$in$-$time model is designed for supply chain efficiencies and economies of scale,$$ said Ashwani Gupta, Nissan Motor Co$.$s chief operating officer. $$The repercussions of an unprecedented crisis like Covid highlight the fragility of our supply$-$chain model.$$

The WSJ article gives details about the background of Lean and the current trend for JIT manufacturing.

As an executive at a major automaker, $($GM$,$ Ford, Toyota, or Tesla$),$ you need to decide if you support lean manufacturing or want to keep more inventory. Give reasons.