[SueW170]

Yes, the lumber mill (sawmill) is required to produce the pine and oak lumber used by the Furniture Factory.
I'm thinking about putting the chain saw on my "someday-wish list" not to use on my own farms, since I prefer to select cut trees so as to keep the look I want, but to use at the MP since I'm concentrating on lumber production and as a primary "industry" on FT. With, of course, the furniture factory to use the lumber.
If we ever get a viable way for the buy-sell feature to work out, I'd like to sell logs, too.

Originally Posted by Double T Dude Ranch

Chainsaw chops trees, like pine, oak, bamboo and cinnamon. Then yes the first three trees are used in the furniture shop. Link in my sig for the game guide has a chapter (number 13) on facilities and you can look up what the furniture shop uses. Some of it uses turkey feathers as well. And believe you need the lumber mill to process the trees as well before using the furniture factory.