done manually with huge sheets of paper and rulers. Scheduling trains is a very hard problem
Just because it is a hard problem, it doesn’t mean it is easier to do with paper and rulers than with algorithms. So the problem being “hard” should be unrelated to Sweden being behind the times.
The problem with train scheduling is that computers don’t just make it better. There’s a very real chance computers could make it worse or result in approximately the same outcome but not require millions in investment into a new system.
Just because it is a hard problem, it doesn’t mean it is easier to do with paper and rulers than with algorithms. So the problem being “hard” should be unrelated to Sweden being behind the times.
The problem with train scheduling is that computers don’t just make it better. There’s a very real chance computers could make it worse or result in approximately the same outcome but not require millions in investment into a new system.