Project Delivery ... before opening mouth matrix ...

From experience, I prefer to under promise and over deliver. It gains the greatest satisfaction and ensures that in the eyes of others the objectives are met. I may not always achieve this, but on the whole it tends to work.

Seeing an email exchange taking place in another sphere, I am wondering if they need to apply my 'before opening mouth matrix', seen below:

(c) Andrew Smith, copying and reuse allowed with attribution

Feel free to share (and attribute), it may help someone prevent an unsightly professional embarrassment.