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Availability Check (ATP), Partial Confirmation and Backorder Rescheduling

A deep dive into confirmation: the availability check confirms what stock and planned receipts allow, splitting the order into schedule lines; when supply arrives earlier than planned, confirmed dates do not move by themselves — backorder rescheduling brings them forward.

Educational content. SAP behaviour varies by configuration and release. Spotted something off? Report it.

Digital twin

Docs
SAP DOCUMENTSVisualization of Availability Check (ATP), Partial Confirmation and Backorder Rescheduling. All information shown in the scene is also available in the caption and the panels next to it.
Demo data

01Order for 100, only 60 in stock

ATP confirms 60 EA today and 40 EA on the production order's finish date.

SAP

Availability check

Stock
60
Planned receipt
40 in 2 weeks
Result
Two schedule lines

Business scenario

Demo Retail orders 100 EA of FG-2000. 60 are in stock; production will deliver 40 more in two weeks. The customer accepts partial deliveries. Production then finishes a week early.

All companies, numbers and documents are fictional demo data.

Step-by-step flow

  1. 01

    Order for 100, only 60 in stock open in twin

    ATP confirms 60 EA today and 40 EA on the production order's finish date.

    Each confirmed quantity gets its own schedule line and date.

  2. 02

    Deliver the 60 available today open in twin

    Partial delivery allowed: 60 EA ship now (601).

    Partial delivery settings on the customer master and item decide whether this split is allowed.

  3. 03

    Production finishes a week early open in twin

    40 EA are received from production (101) a week ahead of plan.

    But the order's second schedule line still says 'in 2 weeks'.

  4. 04

    Will the order move forward by itself? open in twin

    The 40 EA are in stock. The order still shows them confirmed for next week. What now?

    Re-checking every order on every receipt would be expensive, so it is a deliberate (often scheduled) step.

  5. 05

    Stock waits on the shelf open in twin

    Without rescheduling, the delivery due list shows the 40 EA only next week. The customer waits a week for stock that is already here.

    Rescheduling (V_V2) or backorder processing (V_V1, CO06 in ECC; advanced ATP backorder processing in S/4HANA) re-confirms against current supply.

  6. 06

    Rescheduling confirms the 40 today open in twin

    V_V2 re-runs the check: schedule line 2 is now confirmed for today.

    If several orders compete, the order of rescheduling decides who gets the stock — in S/4HANA, backorder processing uses configurable priorities.

  7. 07

    Deliver the remaining 40 open in twin

    40 EA ship a week earlier than promised.

    Billing follows for each delivery as usual.

  8. 08

    Order complete open in twin

    Partial confirmation → partial delivery → early receipt → rescheduling → final delivery.

    Scope of check, partial delivery rules and rescheduling together decide how well promises match reality.

SAP documents

Drag to pan · Ctrl + scroll to zoom

Stock impact

StepPlant / SLocStock typeMvTChange
Deliver the 60 available today1000 / 0001Unrestricted use601−60 EA
Production finishes a week early1000 / 0001Unrestricted use101+40 EA
Deliver the remaining 401000 / 0001Unrestricted use601−40 EA

Accounting impact

Goods issue for the delivery

Typical

Deliver the 60 available today

  • Dr Cost of goods sold (GBB/VAX)₹72,000
  • Cr Inventory — finished goods (BSX)₹72,000

Inventory value to cost of goods sold.

Receipt from production

Typical

Production finishes a week early

  • Dr Inventory — finished goods (BSX)₹48,000
  • Cr Factory output (production order) (GBB/AUF)₹48,000

Finished goods at standard price against the production order.

Goods issue for the delivery

Typical

Deliver the remaining 40

  • Dr Cost of goods sold (GBB/VAX)₹48,000
  • Cr Inventory — finished goods (BSX)₹48,000

Inventory value to cost of goods sold.

Typical conceptual flow. Actual G/L accounts and posting behaviour depend on material valuation, automatic account determination and system configuration.

Movement type

  • 601GI for deliveryReversal: 602

Promises customers realistic quantities and dates, and keeps those promises up to date as supply changes.

Transactions & Fiori apps

  • VA01 — Sales Order (ATP)
  • CO09 — Availability Overview
  • V_V2 — Rescheduling of Sales Documents
  • VL01N — Delivery
  • Configure BOP Segment, Schedule BOP RunS/4HANA advanced ATP; availability depends on scope

Differences by SAP version

Classic ATP with V_V2 rescheduling and manual backorder processing.

Configuration

  • Scope of check (OVZ9)

    Configuration dependent

    Which stocks, receipts and issues count.

  • Replenishment lead time

    Configuration dependent

    Whether the check assumes stock can be replenished within the lead time.

  • Backorder processing (S/4HANA aATP)

    Configuration dependent

    Rules and priorities for redistributing confirmations.

Prerequisites

  • Availability check group on the material
  • Checking rule for the sales transaction
  • Partial delivery settings on the customer

Master data

Material master (sales / MRP views)
Availability check group.
Customer master
Partial delivery and complete delivery settings.

Organizational structure

  • Plant 1000

Tables

TableDescription
VBEPSchedule lines with confirmed quantities and dates

Integration

  • PPPlanned and production orders are receipts in the check.
  • MMStock and purchase orders as supply.

Common errors

  • “Stock available but order not confirmed”

    Likely causes: No rescheduling since the receipt; Stock reserved for other orders; Scope of check excludes the stock type

    Where to look: CO09 · V_V2 log · Scope of check

Troubleshooting

Something went wrong? Work through these checks in order. They are diagnostic questions, not configuration instructions — confirm changes with your system owner.

  1. CHECK 1

    Confirmation

    • Scope of check?
    • Rescheduling run since the receipt?
    • Competing orders?

Interview questions

  • How do orders get confirmed earlier when supply improves?

    Not automatically. Rescheduling (V_V2, ECC) or backorder processing (V_V1/CO06; in S/4HANA advanced ATP backorder processing) re-runs the availability check for open orders, in a defined priority, and moves confirmations accordingly.

Quiz

Q1 · Diagnose the scenario

Stock arrived but an older order still shows a confirmation next week. Why?

References

  • SAP SE — SAP Help Portal: Availability Check in Sales (source)
  • SAP SE — SAP Help Portal: Backorder Processing (source)

Explanations are original. They summarize standard behaviour; always validate against your system's release and configuration.

Version history

VersionChange
1.0.0Initial version.