De or het processturing?

The correct Dutch article is:

de processturing

Rule Words ending in -ing: almost always de. See the rule

How to use processturing

the processturingde processturing
this processturingdeze processturing
that processturingdie processturing
our processturingonze processturing
your processturingjouw processturing
every processturingelke processturing
which processturing?welke processturing?
a big processturing / the big processturingeen grote processturing, de grote processturing