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Adding randomisation to time in rules

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Adding randomisation to time in rules 10/07/2020 at 23:02 #129454
bill_gensheet
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487 posts
At present we have 'train Y must enter NN minutes after train X (does something)'.

Could NN support a limited amount of mathematical function ?

That would allow say "NN" to be "10+(RND(0)*15)" so giving randomly between 10 and 25 minutes.

This would allow variable loading / unloading / shunting times to be utilised in timetables

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Adding randomisation to time in rules 10/07/2020 at 23:27 #129459
GeoffM
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5067 posts
It is already slightly randomised, though not to that extent.
SimSig Boss
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Adding randomisation to time in rules 11/07/2020 at 20:51 #129485
bill_gensheet
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487 posts
My understanding is that randomisation though is 'difficulty' based and also applied mainly to lower class trains - is that right ?

My thinking was to allow the timetable author to apply potentially quite heavy randomisation to specific trains regardless of class.
Trip freight, sundry/parcels and loco serving spring to mind as the main uses. Not mail - they never went wrong did they Postal :-)

Bill

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Adding randomisation to time in rules 11/07/2020 at 21:14 #129486
postal
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bill_gensheet in post 129485 said:
Not mail - they never went wrong did they Postal :-)
Well, when they did it was always the railway's fault! Particularly in the days before the migration to road started just before 1990 and there were lots of shunt moves with BGs/GUVs switched from one train to another etc, there were BR/RM meetings before every TT change to make sure that there were agreed contingency plans for every one of the swaps. You would for example have a brake shifted from one train to another at Derby and you would have a written down set of contingencies so if the train bringing in the brake was late but by less than X minutes the receiving train would be held, then if the train was X to Y minutes late the brake would be held in the bay at Derby and shunted onto the next RM train going in the appropriate direction and then again it the train was more than Y minutes late BR would trip the single brake to destination.

VInce would be able to tell you a lot more about that subject.

“In life, there is always someone out there, who won’t like you, for whatever reason, don’t let the insecurities in their lives affect yours.” – Rashida Rowe
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