A financial institution is set to initiate an update to its transaction processing platform. Ahead of this update, the security department must ascertain that the platform's security integrity remains intact. Which initial step should the security department take to ensure that the platform's upgrade will not weaken its current defense mechanisms?
Broadcasting the timetable for the update to all involved parties.
Evaluating the potential effects of the update on the system's defenses.
Combing through the documentation of the system's current deployment.
Monitoring user interactions with a beta version of the updated platform.