"You are overhead — until and if you ever deliver." - That's a very "engineery" statement. History is littered with engineers that build great things and never

"You are overhead — until and if you ever deliver." - That's a very "engineery" statement. History is littered with engineers that build great things and never convert them to commercial success. This is a two-fold sin. The engineer is never compensated for their hard work and the world never benefits from their efforts. "Engineers are overhead, until and if you ever deliver." - the statement is open enough to be non-meaningful but still come across as an ad-hominem. Of course a salesman shouldn't lie to the client, and you spotlight a couple of examples of this. Salesmen also tend to be hyperbolic in most forms of communication. It takes a good relationship between sales and engineers to understand the difference between a "must have" feature and a salesmen being a salesman. The underlying issue you're highlighting is that salesmen at some point continue to do "discovery" while engineers get upset that it makes their Gant chart non-symetrical. I agree that a good relationship between sales and implementation is important, but your personal take on it reads like you just got in to an argument with a salesman and wanted to let off some steam. Respectfully.