We bill $120 hourly. If the client CC the whole team on a problem, the whole team is going to take time off their current work to read the email. (5 mins * 6 workers) They are then going to reply to the message (2 mins * 6) and then investigate (10 mins * 6). A manager is likely going to step in and manage the team (30 mins). Finally, one developper is going to fix the issue (1 hour) and all the other developers are going to require getting back in "the zone" (average of 11 mins *6).
That's three hours (or $360) wasted for an email that should have been properly sent to the product manager or to the support team. If the client do this every week and nobody notice it and educate him, he is going to waste thousands a month of the project's budget.
What are you proposing? That when the client don't use the proper channels, we simply do the work for free?
We pride ourselves on how close to the client we are. If there is an emergency, they can email the team 24/7 and they will get a response. That doesn't come for free. If the client abuse of it, so be it, but they better be able to pay the bill at the end.
Approximately zero most of the time - and potentially hours of productive work. I really like this comic for it's accuracy and I've shared it with a few project managers at work so that they'd leave me alone.
A 10 second interruption is enough for me to lose 10 minutes of my time. Have twenty 10 second interruptions in the day and I've lost over 3 hours of productive time. Interrupt an entire team who potentially lose 10 minutes for that 10 second interruption and across a team of 10 people you've potentially lost 30 hours of productive time.
Less meaningless distractions is better.
Would you enjoy a book if I interrupted you every 3rd page for 15 seconds?
We're not discussing geological timescales here. All the teams I've worked on lose a lot more than the couple minutes after an all-hands "something's horribly broken! whoops, my bad" panic.
But if you're truly 10x like the HN community, that adds up to a whole 20 minutes of developer time! Adding this among an entire team adds up to hours.
Approximately zero.