Rushing

Rushing rooms is a mechanic found in Fallout Shelter. It can be done at anytime to speed up the production of a room. However, there is always a chance to fail, which will trigger and incident. After attempting a rush the rooms production timer will reset, regardless if the rush passed or failed. The chance of a rush failing will increase after each rush attempt, and will not reset until the game has been exited.

chance to fail calculated by $$40-(B+L)*2+10*attempt$$ where L is average Luck, B is average room ability (Strength for Power generator, Agility for Diner and so on).

Note
Unlike Fallout canon game, outfit can rise your dwellers attribute above 10, that affect all game mechanics.