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Just back from a two day sidetrip to Fukuoka. One of my objectives was to pick up a string diagram of the Nishitetsu Omuta Line. These are available free to the public. Afaik Nishitetsu is the only railway in Japan, and quite possibly the world that offers this type of timetable to the public. Quite remarkable and fascinating to examine, though the pocket size requires a magnifying glass to read.
Relating to the post about delays, here is a paper co-authored by Tokyo Metro sujiya Mr. Kohei Ushida, who was profiled by NHK in their Professionals TV documentary. He is the inventor of the chromatic diagram, which gives a better idea of how delays develop in the running timetable. Though it doesn't cover the process of timetable recovery after accidents and bad weather etc, it does give you an idea of how timetables are managed and modified to make train run on time, or at least reduce delays. http://www.railway-research.org/IMG/pdf/f1_tomii_norio.pdf