Supply Chain
Everything that moves, and everything promised before it moves.
Requisitions, purchase orders, receiving, inventory, warehouses, suppliers and sourcing. An approved requisition commits budget before a penny is spent; a receipt moves stock at bin and lot grain and posts the accounting entry at the same instant.
Watch for: A lot-controlled item will refuse a receipt without its lot number. That is the rule working, not the form misbehaving.
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Master Data
What you stock, where it sits, how it is measured, and how it is configured.
Sourcing
Ask the market, agree the terms, and keep the supplier honest.
Purchasing
Demand through commitment, receipt, invoice and payment.
Inventory
Perpetual stock, individual units, and what to reorder.
Warehouse
The structure of the building, the work that happens in it, and the trailers outside.
Transportation
What goes on the vehicle, who moves it, where it has got to, and what it cost.
Planning
What will be wanted, what would have to happen for it to be met, and who does it when.
Reporting
The catalog over everything above.