I would like to clarify something.
SBS Transit and SMRT Buses can actually deploy buses
into some non-basic bus services.
Since Service 401 uses buses from Service 196 and Fast Forward
196e, SBS Transit can actually implement crossover slots for buses
from Service 196 and Fast Forward 196e.
SMRT Buses should also implement crossover slots from Service
925 or Services 177 and 925 to deploy buses on Service 926.
Premium services 589 and 598 can be handed over to Bus-Plus,
since its Toyota Coasters are deployed in Bus-Plus services such as
Services 541 and 547. The Lentor Estate and Teacher's Estate bus
services, as well as SMRT Link, can all be handed over to
Bus-Plus.
Some weekend buses can be deployed on Service RWS88 (SP/RWS88)
from KJDEP to better control the bus service.
Nite Owl and NightRider services can also get some buses since
they operate on a Friday, Saturday and eves of public holidays
basis.
No point running Sv 401 and 925 on weekdays. Sv 177, 196e &
925 needs the buses more.