A second region now means a second set of tools

China+1 was a slogan that meant “Vietnam, and hope.” Multi-region manufacturing means something more expensive: qualified capacity in at least two blocs, with tooling, quality systems, and second-source chemistry to match. Geopolitics and tariffs did not create the preference. They removed the option of pretending the single-source plant was efficient rather than fragile.

The cost shows up where the finance model left it out. Two sets of moulds. Two PPAP packs. A materials engineer in Monterrey and another in Penang making the same part from steel that is not quite the same. Inventory that looks idle until a shipping lane closes. Boards are accepting a lower return so that a plant still ships.

The process three tiers down

Electronics discovered this in substrates and rare earths. Pharma is discovering it in APIs. Auto is discovering it in magnets, semiconductors, and the chemicals that make a battery electrode. Moving final assembly is the easy layer. Moving the process that sits three tiers down is the work. A dual-source strategy that stops at the contract manufacturer is a dual-source strategy in name only.

If the second region cannot make the part when the first is closed, the second region is a warehouse.