Good functional writing is not a neutral message with a greeting attached. Audience and purpose change what information deserves emphasis, how much explanation is needed, what tone is appropriate and what the reader should do next.
The communication equation
writer role + reader relationship + purpose + required content + situation = communication choices
Same event, different audience
Imagine a school club trip has been postponed because of severe weather.
To a close friend: “The trip’s off tomorrow because of the storm warning. They’re trying to move it to next Saturday.”
To participating parents: “Tomorrow’s club trip has been postponed following the severe-weather advisory. We are currently checking whether it can be rescheduled to next Saturday and will confirm the new arrangements once transport is secured.”
The underlying facts are similar. The second version supplies more procedural certainty because the audience needs reliable arrangements, not merely news.
Purpose controls selection
| Purpose | What the writing must do |
|---|---|
| inform | make essential facts clear and usable |
| persuade | give reasons that matter to this reader |
| request | state the action clearly and make compliance practical |
| complain | describe the problem, impact and reasonable remedy |
| recommend | connect evidence or criteria to a proposed choice |
Reader knowledge changes explanation
A teacher already knows school procedures; an external visitor may not. A message to a classmate can use shared context that would confuse a parent. Do not omit information merely because the writer knows it.
Persuasion is audience-specific
If asking a principal to extend library hours, “students will like it” is weak. Stronger reasons might concern study access, supervision, existing demand and practical staffing. Persuasion works when reasons intersect with the reader’s responsibilities and concerns.
Transfer drill
A community centre is considering cancelling a weekend study room because attendance is uneven. Write one sentence aimed at student users and one aimed at the centre manager, both supporting continued operation.
Possible answers
Students: “If we want the study room to stay open, we need to use it consistently rather than only before examinations.”
Manager: “Instead of closing the room immediately, the centre could test a reduced weekend schedule and track attendance across the examination cycle before deciding whether demand is genuinely too low.”
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