DA is published.
MDA is published + a company specified increment.
Circling is published.
Next time someone challenges you on this, gently tell them this true scenario which happened a few years back at my airline:
Published DA is 214ft. They select 220ft because they want to round it up. Minimums call, go around, can't see the required runway elements. They set up again and this time select 214ft for minimums. Another approach, minimums call, runway lights in sight, continue/land.
True story (but with different minima values - I think they set 330 instead of 321 in the real scenario).