Mrs. Yumiko Oshiba (干場弓子), President Director of Discover [ja], describes [ja] how is the workflow like in a publish company specialized in business books.
Five seem to be the most decisive phases: 1) finding an author and/or a project, 2) deciding how to structure the book and writing coaching, 3) draft check and coming up with a good title, 4) designing the cover of the book, 5) proofreading. Publicity, marketing and a good promotional campaign are also fundamental to the process.