One may jest but the subtext of The Postman (particularly the David Brin novel, which I can recommend) is analysing which pre-apocalyptic institutional operating models are predisposed (or otherwise) to being rebooted/reconstituted even after the loss of all staff and centralised records, which is a definition of business continuity and process resilience I certainly intended to be in scope of the remark above.

Which is to say, Kevin Costner did make a movie about it. Just not a good one.

In practice though you can simulate/stimulate most of the failure mode conditions of central control dependencies by parking a delivery truck underground, or addressing something to a farm.