Timing and day of run is very important and should always be factored in while making train.
For eg. ERS-SBC is one the most heavily demanded sector in IR. But one needs to know that any new train that need to be introduced on the route should be a weekly one - dep SBC on Fri night after 19:00 reach ERS on Sat morninig....similarly dep ERS on Sun night after 20:00 and reach SBC early morning on Monday.
Any other timing or day of run will not benefit the public.