Both ISO/IEC 27001 and 27002 are "harmonized" with other management standards, including ISO 9000 and ISO 14000. ISMS is much more focused and generally requires significantly more resources to perform, on the basis of comparable organizational characteristics. However, because of the similarities we are starting to see certification bodies offering combined audits at a reduced cost. If you are certified under ISO 9000, it will cost less to maintain your ISO 27001 certification than it would cost if you are not ISO 9000 certified, because of certain shared practices. Indeed, some organizations cover both their in-house ISMS and QA schemes under a single management system and undergo single audits.