As I understand it, there's also the case that you can't just move from one fab to another of the same process size at will. There's different setup/software/p

As I understand it, there's also the case that you can't just move from one fab to another of the same process size at will. There's different setup/software/procedures, so the capacity isn't instantly interchangeable. There may even be fabs with excess capacity, but no "ready" customers.