Another thing that comes to mind...
In December they changed the software used for train scheduling in southern Sweden. The same day there was extreme cold and a lot of snow that continued for two weeks... At the same time they had serious optimisation problems with the software (which I know from an inside source). Guess what they blamed? And then the snow disappeared while they had not fixed the software issues. Guess if there where any change to the scheduling problems? They have still not fixed them...
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