I'm new at Fallout Shelter and every time I create a new Vault, I have problem to get enough resource.
So, on my last game, I'm full focused on resources rooms. For each resource I have 2 merged room, updated one time and always full. On stat I had something like 9.5 Water production / minute, and when I have updated this room again I got 7.0 Water production / minute..
WT. ?! Which game give you a worth production when you update it?
I was full stock and now everyone is dead, cause I got no more caps (update cost 1125, all my save).
Did you check your dweller stats? The higher the appropriate stat is, the faster the individuals in the room work. So take a water treatment plant. If your perception in the room is now lower than it was in your other room, the production time will be longer. You can fix early in the game by making your dweller wear outfits you collect to push the appropriate stat. Later, you can raise them using the training rooms.
On top of this, the happiness of your dwellers will all increase the amount of bonus resources you get.
I had the same problem when I first started. I started over like 3 times. Like what the answer says above matters also don't over do the rooms always make sure you have enough people to each room. When making babies do it one at a time. Don't make the rooms bigger unless you have enough people. Basically don't over do it. Patience is key.
Sometimes even when you produce more than you consume, you cannot store it, or you are not collecting it while you are online. This was a problem for me in the early stages.. And if that is not the problem you might want to check that you are matching the right dwellers with the right room (for example; a dweller with a lot of agility, or A, would match with the diner, while someone with High strength, or S, would match with a power plant) I know this sounds basic and easy, but I have seen this issue a number of times, just make sure you double check.