Updating the plan periodically has the greatest positive impact on the ability to execute a disaster recovery plan (DRP). This is because an up-to-date plan is more likely to reflect the current environment, and any potential risks or issues can be addressed before an emergency arises. Storing the plan at an offsite location, communicating the plan to all stakeholders, and conducting a walk-through of the plan are all important steps, but they do not have the same impact as regularly updating the DRP.

Senior management review and approval of an information security strategic plan is important to ensure that the plan is aligned with the organization's overall corporate governance objectives. It is also important to ensure that the plan takes into account any legal and regulatory requirements, as well as the resources and staff needed to properly implement the plan.