[Superseded by SP 800-55 Rev. 1 (July 2008): http://www.nist.gov/manuscript-publication-search.cfm?pub_id=152183
] This document provides guidance on how an organization, through the use of metrics, identifies the adequacy of in-place security controls, policies, and procedures. It provides an approach to help management decide where to invest in additional security protection resources or when to research the causes of nonproductive controls. It explains the metric development and implementation process and how it can also be used to adequately justify security control investments. The results of an effective metric program can provide useful data for directing the allocation of information security resources and should simplify the preparation of performance-related reports.