All topics
3 / 60
EBSbeginner

Oracle EBS Module Overview: PO, OM, INV

Understand the procurement, order management, and inventory modules and their integration points

Three modules run the supply chain, and they are tightly coupled by design.

PO, OM, and INV work like a restaurant's supply chain: PO is ordering ingredients from vendors, INV is the walk-in fridge tracking what's in stock, and OM is the waitstaff taking customer orders that draw down that same stock.

Key Concepts

1
    PO   requisitions, purchase orders, receiving
    OM   sales orders: entry, scheduling, picking, shipping, invoicing
    INV  items, on-hand quantities, and every material movement
2
INV underpins both of the others. OM asks it whether stock is available and reserves it; PO receives goods into it.
3
So the item master and the organisation structure are shared foundation data. A poorly designed item or organisation setup produces problems in all three modules at once, which is why it is decided first and changed reluctantly.
4
Two end-to-end cycles, which is how interviewers frame it.
    Procure-to-Pay:  requisition -> PO -> receipt -> invoice -> payment
                     PO          INV      AP
5
    Order-to-Cash:   order -> pick -> ship -> invoice -> receipt
                     OM      INV     INV     AR
6
Each step is a document referencing the one before, and each crosses a module boundary at a defined point.
7
Drop shipment shows how coupled they are. A sales order flagged for drop ship automatically creates a purchase requisition in PO. The goods go from the supplier straight to the customer, and both cycles run against the same transaction.
8
Statuses are how you find a stuck transaction, and knowing them is the practical skill:
9
    OM   Entered -> Booked -> Picked -> Shipped -> Closed
    PO   Incomplete -> Approved -> Open -> Closed -> Finally Closed
10
A stuck order is at a status, and the question is always what should have moved it on. An order Booked but never Picked means pick release did not run or found no available stock — which puts you back in INV.
11
Available to promise is worth understanding. ATP does not just check on-hand quantity. It considers existing reservations, planned receipts and lead times, which is why an order can be rejected with stock physically present — that stock is promised to somebody else.
12
Where the modules meet accounting. Receiving in PO and shipping in OM both create accounting entries, which flow through to AP and AR respectively. So a supply chain problem surfaces as a financial one a week later, and tracing it back means following the document chain.
13
What the interviewer is probing.1. "Walk through procure-to-pay in EBS." Probing: end-to-end flow. Stalls: "You raise a PO." Moves up: requisition, approval, purchase order, receipt into inventory, invoice match in AP, payment — with inventory and accounting updated at receipt.
14
2. "What is the difference between a standard and a blanket purchase agreement?" Probing: the vocabulary. Stalls: "Nothing." Moves up: a standard PO is a specific commitment; a blanket agreement sets terms with releases drawn against it over time.
15
3. "What triggers the accounting at receipt?" Probing: the integration point. Stalls: "Nothing." Moves up: the receiving transaction creates the inventory and accrual entries, which is where PO meets inventory and GL.
16
4. "What causes an order to be stuck in Order Management?" Probing: troubleshooting. Stalls: "A bug." Moves up: a hold, a failed workflow activity, incomplete setup for the order type, or no available inventory for the scheduled date.
Use cases:scmpoominventoryo2cp2p