Tumbling is the most widely used way of dry powder blending in the Oral Solid Dosage (OSD) manufacturing environment.  Wim Spook  at Matcon Ltd demonstrates how IBC Blenders can significantly increase your blending capacity and reduce your manufacturing costs, when compared with other methods of dry powder blending.
https://international-pharma.com/wp-content/uploads/2014/01/How-to-double.1.pdf