Which release strategy control prevents a planning run from changing the quantity on a purchase requisition in SAP Materials Management?

The fixing indicator serves a crucial role in controlling how purchase requisitions are handled in SAP Materials Management. When a fixing indicator is assigned to a purchase requisition, it determines that the quantity specified in that requisition cannot be altered during a planning run. This essentially locks the quantity, ensuring that any dependent planning activities, such as MRP runs, respect this fixed quantity and do not make automatic adjustments based on changing inventory levels or demand forecasts.

By using a fixing indicator, organizations can maintain better control over their procurement process, ensuring that certain requisitions remain stable in terms of quantity even if other variables in the system might suggest a need for adjustment. This is particularly useful for strategic or long-term purchases where quantity stability is essential for planning purposes.

In contrast, the other elements listed—release code, release group, and field selection key—serve different functions within the release strategy framework and do not specifically prevent changes to the requisition quantity. The release code is related to which user can release a requisition, the release group categorizes requisitions for processing, and the field selection key determines which fields are mandatory or optional during document creation. None of these directly lock the quantity against changes from planning runs.