Email, call or chat: choosing the channel
AI for email and communication · Lesson 1 / 21
Email costs more than it looks
A five-line email takes the writer three minutes and every recipient about two, plus whatever thread it starts. The real price of one message copied to five people is roughly twenty minutes of other people's time. So the first question is always: does this email need to exist at all?
When email is the right channel
- You need a record. An agreement, an approval, a commitment with a date — something people will come back to in a month.
- Different time zones or schedules. The recipient answers when they can.
- More than two paragraphs of context. In a chat window those get scrolled past.
- More than three recipients who all need the same version of the facts rather than a retelling.
When email is a mistake
- You need a decision today. The median reply to a business email arrives in four to eight hours. If your deadline is tighter than that, this is a call.
- You are on the third round of clarifications. The first reply is normal, the second means you phrased it badly, the third means the channel cannot carry the topic — take ten minutes on the phone and come back with one message titled "confirming what we agreed".
- The topic is emotionally charged. Text reads about half a tone colder than it was written: the reader has no access to your intonation and substitutes their own.
- You are writing to "put your position on record" before a fight. That is a record for the file, and records follow conversations rather than replace them.
The three-question test
Before writing, answer these: what should the recipient do, by when, and what happens if they never reply. No answer to the first means the message is informational and belongs in a shared channel. No answer to the third usually means you can skip sending it.
Insight. Emails sent after 6pm get answered roughly a day later than the same emails sent in the morning: they land at the bottom of the evening sweep and are buried under fresh mail the next day. Scheduling delivery for 8:30 costs nothing and buys a day.
Common mistake. Copying someone's manager to speed up a reply. It works exactly once. After that people only read you when the manager is copied, and you have permanently lost the ordinary channel.
Pro tip. If the word "discuss" shows up in your draft, you do not need an email — you need fifteen minutes. Send a calendar invite with a three-point agenda.
Cheat sheet
- Price an email in other people's minutes, not your own.
- Email is for records, context and mismatched schedules.
- A third round of clarifications means switch channels.
- No action and no deadline usually means no email.
1. How many rounds of clarification signal that you should switch channels?
2. When does email beat a chat message?
3. What does the third test question — what happens if nobody replies — reveal?