Custom field available in the Units view used to store the calculated stow factor (N4 stow factor) from XPS. The field tbduStowFactor (on page 1) (used in the TBD Units view), and the attribute N4 Stow Factor (used in XPS container lists and work queues) also store this value. It's possible that the value stored in tbduStowFactor and ufvStowFactor can get out of sync with the stow factor that each XPS client computes dynamically when the Stow Factor attribute is displayed.