biohazard72
Prince
Manufactory is really weak. If food is limiting your production ability, Maritime CSs, Granaries, and Water Mills can provide the food required to cover working a hill or forest tile without wasting your GE. If you're limited by production tiles, one tile isn't likely to make a difference and you're probably better off rushing a wonder, especially since the city in question would likely be very large (few production tiles = many food tiles usually) and therefore would benefit significantly from the "citizens*30" part of the formula.
Besides, a far better way to increase production in a production-poor and large city is to rush-build Statue of Liberty, which makes unemployed citizens 2H. Combined with Civil Society, you get 1F2H citizens with half unhappiness, which is more than enough production to get things done if the city is large enough.
EDIT: Didn't even mention the third option: Golden Age. Timed correctly, it probably nets you more value (hammers and gold) than the Manufactory.
Besides, a far better way to increase production in a production-poor and large city is to rush-build Statue of Liberty, which makes unemployed citizens 2H. Combined with Civil Society, you get 1F2H citizens with half unhappiness, which is more than enough production to get things done if the city is large enough.
EDIT: Didn't even mention the third option: Golden Age. Timed correctly, it probably nets you more value (hammers and gold) than the Manufactory.