Chapter 3
Data Flow: Demand
How a customer forecast travels upstream through the network — from finished good back to raw material inputs.
- 01
What Is a Demand Signal?
Demand in IBP is not a physical flow — it is an information signal that travels upstream through the network to trigger planning.
3 min - 02
Where Demand Enters the Network
The customer forecast lands on Item J — the finished packed seed — and this single number sets the entire upstream plan in motion.
3 min - 03
Demand Propagating Upstream
Watch the 100-unit forecast travel step by step from Item J back to the raw material inputs Items A and B.
interactive 5 min - 04
Lead Times and Demand Netting
How process lead times shift demand backward in time, and how on-hand inventory reduces the quantity that must be planned.
4 min