Before you can track a single batch, you must decide how your SAP system will define its uniqueness. This is the batch level, and it’s a foundational choice with system-wide implications. The decision boils down to two options: Client level or Plant level.

At the Client level, a batch number is unique across your entire organization. Batch number ABC-123 can only exist once, whether it's produced in your German facility or your Brazilian one. This provides a single, unambiguous identifier for a product, which is often preferred in the pharmaceutical industry for global traceability and recall management.

At the Plant level, a batch number only needs to be unique within a specific manufacturing plant. This means you could have a batch XYZ-456 at your facility in France and an entirely different batch with the exact same number, XYZ-456, at your facility in Japan. While this offers flexibility, it can complicate cross-plant reporting and global supply chain tracking.

Once the batch level is set, the next critical configuration is activating batch status management. This isn't on by default. You must enable it in the backend customization, using the transaction code SPRO (SAP Project Reference Object).

This feature allows you to control the usability of your stock. It assigns a status to each batch, primarily classifying it as either 'Unrestricted' or 'Restricted'.

An 'Unrestricted' batch is fully available for use. It has passed all quality checks and can be sold, shipped, or used in further manufacturing. A 'Restricted' batch, however, is blocked. This status is vital for products undergoing quality inspection, awaiting lab results, on hold due to a potential defect, or not yet cleared for release. The system will prevent a restricted batch from being accidentally shipped to a customer, a crucial safeguard for patient safety and regulatory compliance.

With the core settings in place, you need to define how batch numbers are generated. This involves two steps: configuring the number range and choosing the assignment method.

First, you define one or more number range intervals in the system. For instance, you might set up a range from 10000000 to 19999999 for one type of product and PHARMA-0001 to PHARMA-9999 for another.

Next, you decide whether these numbers will be assigned internally or externally.

The choice between internal and external numbering depends entirely on your business process. If you require meaningful, structured batch numbers that contain encoded information, external numbering is the way to go. If a simple, unique identifier is all you need, internal numbering is simpler and less prone to manual entry errors.

With these settings configured, the technical foundation for robust batch management is in place, ensuring every batch can be uniquely identified, its status controlled, and its number assigned according to your operational rules.