Definitely it applies to all kinds of writing, where a feedback loop is desirable, in order to establish a communication channel. In this class, the only thing

Definitely it applies to all kinds of writing, where a feedback loop is desirable, in order to establish a communication channel. In this class, the only thing specific to business writing, is that you try to establish a communication channel with a view to building a business relationship. Nevertheless, I believe there are types of writing where feedback is not desirable. When I write poetry for example, I would rather not hear from anyone who has read something I wrote.