Requirements

Track inventory levels for each product at a granular level per warehouse zone, rack, shelf, and bin.
Handle incoming supplier shipments by creating InboundOrders, verifying quantities against purchase orders, and allocating storage locations for received products.
Process customer orders by generating pick lists, guiding workers through pick/pack/ship steps, and creating shipments with carrier and tracking information.
Assign products to storage locations based on configurable strategies such as zone-based placement for fast-moving items or ABC classification for high-value items.
Monitor inventory levels and notify the purchasing team when a product falls below its reorder threshold for timely replenishment.

List the key non-functional requirements (eg thread safety, extensibility, maintainability, etc.)...