To answer the many inquires they received at the time, Warner Bros. produced a three page pamphlet, in comic strip style, to explain the production of animation cartoons. Clearly the work of a lower level assistant artist, the artwork isn’t so good, but the information in this 1956 handout is essentially accurate.
Click the thumbnails below to see the pages full size. According to this piece, Fifteen months and fifteen thousand drawings are required to create a Warner Bros. cartoon. Note the caricature of Eddie Selzer (the producer) in panel #1 and Beaky Buzzard in panel #7. Adding fuel to the ongoing script versus storyboard controversy, Bugs is shown typing a story in panel #2, while Daffy is sketching the storyboard in panel #3.