De or het trial-and-errormethode?

The correct Dutch article is:

de trial-and-errormethode

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

How to use trial-and-errormethode

the trial-and-errormethodede trial-and-errormethode
this trial-and-errormethodedeze trial-and-errormethode
that trial-and-errormethodedie trial-and-errormethode
our trial-and-errormethodeonze trial-and-errormethode
your trial-and-errormethodejouw trial-and-errormethode
every trial-and-errormethodeelke trial-and-errormethode
which trial-and-errormethode?welke trial-and-errormethode?
a big trial-and-errormethode / the big trial-and-errormethodeeen grote trial-and-errormethode, de grote trial-and-errormethode