Graphic Design alliance with Print shop?

[ACMAir]

I have recently begun to create graphic designs, including logos, business cards and similar, however I was wondering if it would be advantageous to do so, as well as if forming such alliance would benefit my customers.

Do many designers do this?

Thanks

[rob2009]

Yes. I used to do only graphic design and it helped out a lot to have a good relationship with a print shop.