If I remember right (and this may be apocryphal), even Toyota didn't go all-in on JIT manufacturing when they were pioneering it -- they put up strict guideline

If I remember right (and this may be apocryphal), even Toyota didn't go all-in on JIT manufacturing when they were pioneering it -- they put up strict guidelines (eg: suppliers had to be with in a certain distance and have multi-modal transit links) to try to make the system resilient against known possible disruptions.