The document describes the Bone Marrow Processing (BMP) protocol for Terumo BCT's Spectra Optia apheresis system. The protocol uses a single-bag approach to simplify the BMP procedure. Operators can monitor and control the bone marrow processing through the system's intuitive graphical user interface. The protocol reduces processing time to under 90 minutes while consistently concentrating the mononuclear cells and reducing red blood cells by over 97% and volume by over 80%.