One way in which genre, audience, and purpose influence composition decisions can be exemplified in the case of writing emails to an internal audience. The text describes how readers tend to skim over emails very quickly. Especially, when communicating internally within an organization of which you are a member, because people grow accustomed to the usual order of business so they make assumptions and quick judgements about the content of the message. This means that they may miss non-routine information if it is not clearly indicated by formatting conventions or a direct style of language. This kind of instance is noted as a common occurrence in the Workplace Writing text, which goes on to list ways to avoid a communication fumble (15-16). One tip that I think is key is having a descriptive subject line that summarizes your main purpose for writing.
I think that this is specifically relevant to the internal correspondences I will likely write in my career. When writing an email to coworkers and managers, I think it is necessary to consider the demands of that individual’s role, and the scope of their workload, and make adjustments in order to achieve the writing purpose more efficiently. For example, if my team is in the midst of a large project that is behind schedule, my messages will become much more concise and technical.
One way that you might contextualize this shift would be with regard to communication styles with dimensions of sociability and dominance. If I am speaking to a manager who is incredibly busy at the time as we are approaching a deadline, my communication style should shift to be more directive, indicating control over my delegated tasks and low sociability (not unfriendliness, just not wasting time with personal details for the time being).
Thanks for reading!