Just-In-Time Manufacturing

Just-in-time (JIT) manufacturing is a production strategy that minimizes inventory by scheduling component delivery to arrive exactly when needed for assembly, rather than stockpiling parts in advance. Pioneered by Toyota in the 1970s, JIT eliminated warehouse costs, reduced capital tied up in inventory, and exposed production inefficiencies that buffer stock had hidden. The efficiency gains were real and substantial.

The fragility cost was deferred. JIT systems are optimized for environments where supply chains are reliable, demand is predictable, and disruptions are rare and brief. When a single supplier fails, a port closes, or a pandemic interrupts shipping, JIT systems have no buffer. Production halts immediately. The 2011 Tōhoku earthquake, the 2021 Suez Canal blockage, and COVID-19 semiconductor shortages all revealed the same failure mode: systems optimized for efficiency under normal conditions become catastrophically fragile under novel shocks.

This is not an argument against JIT. It is an argument for knowing what tradeoff you have made: lower costs in exchange for reduced resilience. The honest question is whether the efficiency gain justifies the tail risk.