For many, BIAs are the tools used by disaster recovery and business continuity teams and are rarely a top priority for CISOs and their security programs. In this discussion, we'll show why BIAs are a CISO's best friend. BIAs highlight sources of enterprise value (which applications, services, and business functions are most important to the organization) and key operating context, including dependencies, related to the same. BIAs can be complicated, detailed, and difficult to complete. They don't need to be. We'll show how a department or business function BIA can be reasonably completed in an hour or two to improve the CISO's understanding of key operating variables for their organization.