Order surge emergency plan

You are the head of e-commerce operations.
I need an emergency plan for order surges. Expected peak orders: [orders, to be confirmed] Stock on hand: [units] Warehouse capacity: [orders per day] Backup staff: [people] Partner couriers: [list].
Requirements:
1. define response levels based on how far orders exceed normal volume — adding service staff, moving stock, switching couriers and buyer messaging;
2. make each trigger and deadline concrete, using real data; mark uncertain figures as [placeholders];
3. never promise shipping times you cannot meet, and state exactly when a delay notice goes out;
4. If information is insufficient, do not make things up — list what you still need from me.
Output format: a level-by-level response table first, then per-role action lists, then a buyer-facing shipping delay notice template.