The operator should check their train consist against the card when leaving each town, this ensures the jobs listed were done correctly. Any errors should be corrected immediately.
An effort was taken to have the moves concurrent and thus creat the illusion of a a feasible movement of goods. A result of this creats instances where a certain car my not be switched and should therefore be treated as a through car.
There are 10 cards, each with a different consist, which means there is 20 different trains to be run before the first train is run again. Throw in our other 5 or so special trains and 6 more branchline trains that is over 30 jobs in all.
Our railroad runs on the pretext that if an industry requires, say 2 box cars, they also have 2 box cars to ship, and all our industries are staged to allow for this swapping operation.
There is no need to have each consists cards a different colour, now that the east and west cards are glued together and there are no 2 cards with the same consist.
A spread sheet was created to try and make sure each industry was visited. There was also an effort to ensure larger industries received more traffic.