Facility managers use ASTM/IFMA standards when determining the assignment of floor area for

occupant groups. The ASTM International (formerly American Society for Testing and Materials) and

the International Facility Management Association (IFMA) have developed specific standards for

space measurement and allocation to ensure consistency and efficiency in facility planning and

management.

ASTM Standards: ASTM E1836 and ASTM E2570 provide guidelines for space measurement in

commercial and office spaces, ensuring accurate calculations of usable and rentable areas.

IFMA Standards: IFMA offers benchmarking and space utilization metrics that help facility managers

align space usage with organizational needs.

Comparison with Other Options:

Industry-specific standards (A): Varies by sector and does not provide a universally recognized

standard for space allocation.

Open Standards Consortium for Real Estate Standard (B): Primarily focused on real estate data

management rather than floor area assignment.

Accessibility standard (C): Primarily related to ADA compliance and does not specify space allocation

for occupants.

Reference: ISO 41001:2018 Facility Management, ASTM E1836/E2570, IFMA Standards