Judging from the term "Common
models" introduced by operators, it seems like they are just
to..
- Reduced maintenance time ; no
special attention needed to make the bus better, but just make it
work.
- Cut-down of $$ ; not needed to
spend much just to cater the crowd
- Easier to get parts
- Commuters won't be comparing ;
one lousy = everything lousy
Which brings me to compare with HKs..
their one depot can have many
different models/series..but the maintenance standard is there.
They(maintenance crew) have
different things to work on each day, means it's not a "daily
chore".Also means that there
won't be "shortcuts"
But generally the main steps are
similar.
they're increasingly standardizing their fleet to only buses
from ADL and Volvo. Even if there are variants, its only in length.
Hardly a diference when it comes to maintaining the bus.