efficient (formal adjective)
working well without wasting time
productive (formal adjective)
producing good results
effective (formal adjective)
achieving the desired result
beneficial (formal adjective)
having a positive effect
advantageous (formal adjective)
providing an advantage
efficiency (abstract noun)
ability to work well without waste
productivity (abstract noun)
amount of useful work produced
convenience (abstract noun)
ease and suitability
time management (abstract noun)
control of how time is used
flexibility (abstract noun)
ability to change easily
optimisation (abstract noun)
making something as effective as possible
improve efficiency (formal collocation)
make systems work better
increase productivity (formal collocation)
produce more results
effective time management (formal collocation)
good control of time
greater convenience (formal collocation)
more ease
optimal use of time (formal collocation)
best way to use time
streamlined process (formal collocation)
simplified and organised system
improve (power verb)
make better
enhance (power verb)
improve further
increase (power verb)
make larger
enable (power verb)
make possible
facilitate (power verb)
make easier
allow (power verb)
give permission or opportunity
inefficient (formal adjective)
not working well