Automation User Requirement Specification Development :
Having an excellent Automation User Requirement Specification (URS) document is one of the key aspects to achieve a successful automation project.  This document has an impact upon all phases of an automation project up to to the final validation of the installation.

Additional references as to the value  and recommended content of URS documents can be found in the links below:

                             emerson automation experts
                                      RNA automation
                                            URS writer