She brings what planning meetings usually lack: the record. What customers actually asked for, what was promised, what slipped last cycle and why, assembled with sources before the meeting instead of argued from memory in it.
Heidi does not make your strategy calls, judgment stays human, but she demolishes the reconstruction work around them: the evidence arrives pre-gathered, and past decisions arrive with their reasoning attached.
The request-to-shipped workflow is the operational version: demand signals connect to context, get tracked to a decision, and close their loops, so planning starts from reality.