VOFM is a tool developed by SAP to define routines and rules used during business processes. It allows choosing standard SAP routines or custom routines written in ABAP code. VOFM is for implementation teams configuring the system, not end users. It includes areas for copying, data transfer, and formulas. This document focuses on data transfer routines for sales and distribution that fine-tune copied fields during transfer, such as transferring billing header data between documents or deriving shipping conditions.