Kitting/De-kitting
Kitting is the process of combining two or more individual items/SKUs into a one new item for shipping, with the kitted package often receiving its own SKU number.
WMS kitting should be able to manage the process while maintaining visibility into the component SKUs of the kit.
De-kitting Is the reverse process, returning kitted SKUs into individual items, often needed when kits are returned, or more kits were created than were actually needed.