I am using Advanced Train fever total and serving a chain producing 150 units. This is what I did when the production of the chain was apprx 120 units for each industry.
I made a target to supply each industry with 200 units per year (so that i will not have change trains until the production reaches 200). A year is equal to apprx 12 minutes.
Now lets say one train running between 2 stations has frequency of 11 mins.
So I would either make a single train carrying 200 units of cargo or two trains each carrying 100 or 110 units of cargo. This way I am assured that my lines are capable of delivering 200 loads of cargo in 12 minutes.
However I am still experimenting and waiting for the results.
