[trh88]

There are a LOT of assumptions here.

> The rest of the org probably made a schedule they know you can't meet

> Most people probably already know you'll be late, but aren't saying it out loud

> There's a good chance <your boss> already knows as you suspect.

> It's probably not new news to <the project owner> either.

Doesn't take much for one, if not all of those to be untrue. And by the time it unravels, it's too late.