Abstract: A process control method that automatically and comprehensively manages the creation, storage and use of electronic records during the operation of a controlled process and for governing and documenting the users that operate the computer systems that are involved in the creation, storage and use of the electronic records. The method controls a process, such as a chemical process, by receiving measurement information relating to the process, applying rules to the received measurement information to determine a desired response, and sending control information to at least one device associated with the process, so as to modify the process. The method maintains the rules, measurements and control activity in transaction logs or audit trails related thereto in a secure database.