In an ideal situation for any VB, it's better to have maintenance work on those days that has less patronage... like Tuesday, Wednesday or Thursday, cause Friday u would need a train to back to hometown to spend with fam (incase of working in diff city), or maybe for festival occasions or run at those days which Shatabdi doesn't run... for eg: MAS MYS VB and Shatabdi having Wednesday off.... rather it should be that Shatabdi run on Wednesday with Thursday off and VB running on Thursdays with Wednesday off (which is the current case for VB)....