After playing for a while you will figure out what the stat requirements for each room are. This means if you place dwellers with a high strength stat inside this room they will produce power much faster than if they had a low stat. The value on the left shows what skill that this room requires. When you highlight a room in your vault, you will see some stats at the bottom of the screen. If you put 2 dwellers with low Intelligence inside a Medbay it could take over 20 minutes before a stimpack is produced, on the other hand, 2 dwellers with higher intelligence could produce one in 4 or 5 minutes. Each room that you can build has a specific SPECIAL skill that it required dwellers to have in order to run effectively. For example, a dweller with high Charisma will make babies faster when placed inside Living Quarters. SPECIAL stats are used to determine what job your dweller will work best at.

Early on in the game most of your vault dwellers will usually have 2 or 3 of a single skill and won’t be particularly strong in anything. Fallout Shelter SPECIAL Stats are applied to each individual vault dweller. S.P.E.C.I.A.L (Strength, Perception, Charisma, Intelligence, Agility, and Luck) stats are a reoccurring system throughout the Fallout series.

Fallout shelter stat effects