# How to Reverse a Usage Decision in SAP QM > Source: https://netray.co/erp-help/how-to-reverse-usage-decision-in-sap-qm-qa12 > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: ERP Help ## Short answer Reverse a usage decision from QA12 (Change Usage Decision) by changing or resetting the decision on the inspection lot, which also reverses the automatic stock posting from inspection stock, provided nothing has used that stock or closed the lot. If the system refuses, post the stock back with a manual transfer posting and document the reason. The exact menu wording varies by release. ## Kind how-to ## System sap ## Erp SAP ECC / S/4HANA ## Module QM Inspection / Usage Decision ## Query how to reverse usage decision in sap qm ## Alternate Queries - reset usage decision SAP QA12 - cancel usage decision QM - change usage decision after stock posting - undo UD inspection lot SAP ## Applies To SAP ECC 6.0 and S/4HANA on-premise QM. Behaviour depends on QM Customizing, such as lot stock posting and follow-up actions. ## Steps ### How to reverse a usage decision **Items:** - Display the lot in QA03 and check the status (UD set), the usage decision code and the stock posting made. Note the material, batch and quantity. - Check whether the stock from the UD has moved. If the quantity was already issued, shipped or consumed, a simple reversal cannot put it back. - Open QA12 for the lot. Look under the Usage decision or Edit menu for the function to change or reset the decision. The label differs by release, so confirm it in a test client. - Change the code to the correct one, or reset it, and save. The system reverses the earlier stock posting and makes a new one according to the new code. - Check the material document list (MB51 or the lot's document tab) to see the movements: for example movement types 321 and 322 between inspection stock and unrestricted stock. - Review follow-up actions that were triggered by the old decision, such as notifications, certificate output and inspection type updates, and correct them. - If QA12 will not allow it, correct the stock manually through a transfer posting in MIGO (for example 322 to return quantity to quality inspection) and record the reason on the lot. - Record who approved the reversal. For regulated products this is an audit item. ## Sections ### What a usage decision does **Body:** The usage decision (UD) closes an inspection lot, assigns a quality score and a code (for example accepted, rejected, scrap), and usually triggers stock postings that move quantities out of quality inspection stock into unrestricted, blocked or scrap. UD data is stored in table QAVE for the lot. Because the UD drives stock and often certificates, correcting it later is a controlled act, not an edit. That is why QM restricts changes once downstream processes depend on the result. ### When a reversal is possible **Body:** The common blocking conditions are: the stock posted from the UD has already been consumed or moved, the lot has been deleted or archived, or a follow-up action cannot be undone automatically. Authorisation also matters: the user needs rights to change usage decisions for the inspection type and plant. If the stock is still in the posted category, the reset normally works and the system creates the reversing material documents for you. **Code:** QA03 Display inspection lot (status, UD, stock posting) QA12 Change usage decision MB51 Material document list (movement types 321, 322, 343, 344, 349, 350) MIGO Manual transfer posting if QA12 is blocked ### Manual fallback **Body:** Where the standard reset is blocked, a transfer posting in MIGO can move the quantity back to inspection stock or between stock types, using the movement types for the direction you need. This leaves the lot's UD as it is, so the lot data and stock may disagree. Document it and, if needed, raise a correction with the QM owner. Do not edit the QM tables directly. The UD, stock posting and status are linked. ### Prevent the need to reverse **Body:** Most reversals come from a rushed UD. Use the dynamic modification and automatic UD only where the results are trustworthy, and add a second approval for high-value or regulated lots. A short hold on certificate output until the UD is confirmed also saves cleanup. ## Pitfalls - Assuming a UD can always be undone. Stock already used stops a clean reversal. - Fixing only the stock and leaving the lot's UD wrong. - Forgetting notifications and certificates raised by the first decision. - Editing QM tables directly. - Not recording an approval for the reversal in a regulated environment. ## Ai Angle An assistant grounded in SAP QM can check a lot's UD, the stock posting, whether the quantity has since moved and which follow-ups were created, then say whether a reversal is likely to succeed before a person tries it. Netray keeps that read-only and local on-prem; the reversal itself, being a quality record, stays a human action. ## Faq ### Can I reverse a usage decision in SAP? **Answer:** Often yes, from QA12, as long as the stock posted by the decision has not been used and the lot is not closed or archived. The system then reverses the earlier stock posting. If it refuses, a manual transfer posting is the fallback. ### Which transaction changes a usage decision? **Answer:** QA12 changes an existing usage decision and QA11 records the first one. QA03 displays the lot and its status. The exact option to reset or change the decision sits in the Usage decision or Edit menu, depending on release. ### What happens to stock when a UD is reversed? **Answer:** The system reverses the earlier movements from inspection stock and creates new ones for the new code. You can see them in the material document list, typically movement types such as 321 and 322 between quality inspection and unrestricted stock. ### Why can't I change the usage decision? **Answer:** Usual reasons are that the stock has already been consumed or moved, the user lacks authorisation, the lot status blocks changes, or follow-up actions cannot be undone. Check QA03 for the status and the document flow first. ## Search terms how to reverse usage decision in sap qm, reset usage decision sap, qa12 change usage decision, cancel usage decision qm, sap qm usage decision stock posting, undo ud sap, sap qm ud reversal, change ud after stock posting --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json