From the situation to a useful next step.
Here is a possible starting point. In a conversation, we can clarify the circumstances and agree my involvement.
Your selected situation
Separate responsibilities. One shared launch.
Where we could start
I would check how separate commitments combine into one launch. I would prepare either the missing shared sequence or a review of dependencies requiring joint decisions.
What you would have
A joint-launch readiness review with required decisions and owners.
Who needs to be involved
The launch owners from each organisation.
Roles and decisions
Specialists confirm readiness; authorised participants make the launch decision.
Prepare an enquiry
This is an editable starting outline, not a submitted enquiry. Add your own circumstances.