Tip of the day
Skill levels exceeding an activity's main skill requirement gives +1.25% extra Work efficiency for what you're doing, up to 20 levels.

Translations:No Materials Consumed (Mechanics)/10/en

From Walkscape Walkthrough

Let's first go over the high level of what each attribute does especially in the context of transformation recipes. I will use the abbreviation DA for Double Action, DR for Double Rewards and NMC for No Materials Consumed.