DOCUMENT YOUR PROCESS CONTROL SYSTEM SOFTWARE.

SOFTWARE DOCUMENTATION INFLUENCES THE EFFECTIVENESS OF PROCESS COMPUTER SYSTEMS. POLICIES SHOULD BE ESTABLISHED AND ENFORCED FROM THE OUTSET, DELINEATING RESPONSIBILITY FOR CREATING AND MAINTAINING THE DOCUMENTATION, THE TYPES AND FORMATS TO BE PROVIDED AND THE USERS FOR WHOM IT IS INTENDED. PROCEDURES DIFFER DEPENDING ON WHETHER THE SOFTWARE IS OBTAINED ASA STANDARD OR CUSTOM PACKAGE FROM AN OUTSIDE VENDOR OR IS PRODUCED INTERNALLY.