- A simple summary: we need to deliver by x but current estimate point at y being the delivery date.
- An estimate of delivery for each features you have visibility and their dependencies (not task, features. This email will escalate at some point and you need it be management friendly)
- A backing analysis to defend your task time estimate. Maybe as an external link or attachment.
- A suggestion on a set of feature you feel could be cut or postponed after release to keep the project within deadline.
The fire alarm need to be sounded immediately as you see smoke. Start with your direct manager, but first build consensus between the team: you’ll be squeezing the manager toward the owner, and for him tje path of least resistance will be to put pressure on you and the team.