4: Factory has a process to control updating of drawing, specification and etc. Manufacturing process changes are implemented after change communicated and approved by customer. Related records are available.3: Factory has a process to control updating of drawing, specification and etc, but the process is not sufficient. Manufacturing process changes are implemented after change communicated and approved by customer. Related records are available.2: Factory has a process to control updating of drawing, specification and etc. Manufacturing process changes are implemented after change communicated and approved by customer. Some related records are missed.1: Factory has a process to control updating of drawing, specification and etc. but the process is not sufficient and some manufacturing process changes are not implemented after change communicated and approved by customer. 0: No implementation of document updating and manufacturing process change after change communicated and approved by customer.