The 10-to-1 rule of email project management 0
According to this writer’s 10-to-1 email rule, if you are managing a project with ten other participants via email, this may be the result:
9 people read the email
8 people file the email (in their private folders, thereby duplicating effort)
7 people are interrupted in their work or thoughts when the email arrives
6 people will never be able to find the email again
5 people didn’t actually need to know about the change
4 people joining the project in the next phase wouldn’t have received the email
3 people will be able to find the email again, should they need to
2 people will check back to the email at a later date when they need the information
1 of them will understand the email in context, be able to find it at a later date and action it
This type of reasoning is hardly verifiable but it illustrates a point, nonetheless.
Much more credible, in my opinion, is his most recent update where he summarizes the pros and cons of email collaboration
good stuff