Provides guidance to users of the new 2005 editions of BS ISO/IEC 17799 (BS 7799-1) and BS ISO/IEC 27001 (BS 7799-2) on the 'Plan, Do, Check, Act' model and the ISMS process requirements for organizations preparing for accredited certification to BS 7799-2. Updated to include new references and definitions, additional information about the latest developments regarding certification criteria and other related standards developments. It provides industry accepted best practice methods for providing and demonstrating the evidence required by an assessment auditor.