improve on
US /ɪmˈpruːv ɑːn/
UK /ɪmˈpruːv ɑːn/

1.
verbeteren, optimaliseren
to make something better than it was before
:
•
We need to improve on our customer service.
We moeten onze klantenservice verbeteren.
•
Can you improve on this design?
Kun je dit ontwerp verbeteren?