Maintain and Verify Floor Plan Diagrams
Regularly update and review floor plans to ensure they are accurate and current.
Plain language
This control is about keeping an accurate map of your physical workspace, especially where all the cables and tech equipment are. If you don't, you could end up wasting money and time fixing stuff that's not where you think it is.
Framework
ASD Information Security Manual (ISM)
Control effect
Proactive
Classifications
NC, OS, P, S, TS
ISM last updated
June 2026
Control Stack last updated
18 June 2026
E8 maturity levels
N/A
Section
Cabling InfrastructureTopic
Floor Plan DiagramsOfficial control statement
Floor plan diagrams are developed, implemented, maintained and regularly verified.
Why it matters
Inaccurate floor plans can lead to delays and increased costs for maintenance and expansions, negatively affecting daily operations.
Operational notes
Regular communication between IT and facilities teams is essential to ensure floor plans remain up-to-date and accurately reflect the current infrastructure.
Implementation tips
- Designate a facility manager: This person should oversee the creation and maintenance of accurate floor plan diagrams, focusing on areas that include cabling and communication infrastructure. They should gather input from IT and building maintenance teams.
- Have the IT team conduct regular checks: The IT team should periodically walk through the office to check that the physical layout matches the floor plans, particularly focusing on the location of network and communication equipment.
- Schedule regular updates: Set monthly or quarterly times to review and update diagrams, especially after any changes such as office renovations or new cabling installations.
- Involve your security team: The security team should verify that diagrams include sensitive areas, like server rooms, to ensure they are accurately represented for security planning.
- Keep digital backups: Store floor plan diagrams digitally, so they are easily accessible and can be updated and shared without hassle. Use a shared drive or cloud service for easy access.
Audit / evidence tips
- Askthe latest floor plan diagrams: Request the most recent versions of the floor plans, including cabling and equipment locationsLook atdated markings to indicate recent updatesGoodindicates a very recent revision date and clear detailing
- Askrecords of past updates to the floor plans over the last yearLook athow often updates occur and the reasons for changesGoodlog shows regular updates and clear reasons, like renovations or new equipment
- Askwhere digital copies of floor plans are stored and safeguardedLook atsecure access controls to these digital resourcesGoodsetup includes password-protected systems or encrypted storage
- Askwho is responsible for maintaining the floor plans. Ensure there is a clear point of contact and documentation of their roleGoodshows a designated role with specific responsibilities
- Askphysical space review reports: Ask to see reports from recent physical walkthrough checks of the spaceLook atcorrespondence with the diagram updatesGoodreport links directly to changes made in diagrams
Cross-framework mappings
How ISM-1645 relates to controls across ISO/IEC 27001, ISO/IEC 42001, Essential Eight, and ASD ISM.
ISO 27001
| Control | Notes | Details |
|---|---|---|
layersPartially meets(2)expand_less | ||
| Annex A 7.3 | ISM-1645 requires organisations to develop, maintain, and regularly verify floor plan diagrams to ensure they remain accurate and usable | |
| Annex A 7.5 | ISM-1645 requires organisations to develop, maintain, and regularly verify floor plan diagrams to ensure the diagrams accurately represen... | |
These mappings show relationships between controls across frameworks. They do not imply full equivalence or certification.
Related ASD ISM controls in Communications infrastructure
See all Guidelines for communications infrastructure controls, or browse the full ASD ISM library.