Security categorization (commonly based on confidentiality, integrity, and availability impact levels) is meant to reflect the level of harm that would occur if an information type or system is compromised. A business impact analysis, on the other hand, examines the operational and organizational consequences of disruptions or failures—such as loss of revenue, inability to deliver critical services, legal or regulatory exposure, reputational harm, and impacts to customers or individuals. Because these two activities look at impact from different but related perspectives, categorization information should be used during the BIA to confirm that the stated security categorization truly matches real business consequences.

Using categorization as an input helps analysts validate assumptions about criticality, sensitivity, and tolerance for downtime. If the BIA shows that outages or data compromise would produce greater harm than the existing categorization implies, that discrepancy signals under-classification and insufficient controls. Conversely, if the BIA demonstrates limited impact, it may indicate over-classification, potentially driving unnecessary cost and operational burden. Identifying these mismatches early supports better risk decisions, prioritization of recovery objectives, and selection of controls proportionate to actual impact.

The other options describe activities that may occur in architecture, governance, or project planning, but they are not the primary purpose of using categorization information in a BIA. The key value is reconciliation: aligning security impact levels with verified business impact.