When the perk triggers, it prompts the message: Your breakdown perk causes you to instantly disassemble the item.
Chance (level 20)
Utilising breakdown allows the full use of a beast of burden, particularly with 1-bar items such as daggers. It is a significant time saver when the produced item is planned to be dismantled anyway - but be aware that it also dismantles high value items (e.g. malevolent armour) without warning.