If you’re a generalist, as most tech writers are, you write about many things in a variety of media with a number of objectives. Each new job involves determining who your audience is, what their needs are, and how your product or service can satisfy those needs. Then you need to recognize, understand, and adjust your writing so one time it appeals to the camper and the next time to the business owner.
Moore, W. Leonard. Technical Communication Center (2009). Articles>Business Communication>Technical Writing