This document specifies the definition and calculation of surface area and volume indicators.
In defining area measurement, this document uses three measurement concepts:
a) the intra-muros and extra-muros concept used in many parts of the world;
b) the wall centre method of measurement used in many parts of the world;
c) variations on these methods to comply with certain national laws or for particular types of
The surface area and volume indicators defined in this document are intended for practical use, as a
basis for measuring various aspects of the performance of buildings or as a planning aid. In other words,
they should enable judgement to be made on functional, technical and economic aspects of buildings.
This document is intended to be used when establishing
— specifications for the geometric performance of a building and its spaces (e.g. in design, purchasing
procedures, etc., or in building regulations where appropriate),
— technical documentation relating to the performance of whole buildings prepared by designers,
contractors and manufacturers,
— the amount of floor area that will not be effectively available for the placement of an individual’s
workplace, furniture, equipment, or for circulation, and
— evaluation, comparison or control of the properties of a building which are connected to its geometric
NOTE Although there are a variety of methods of area measurement around the world depending on the
country and/or types of buildings, all measuring methods are not necessarily of practical use because of inability
to identify real area (e.g. the wall centre method of measurement). Thus, this document specializes in the
measurement solely for practical use.
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This International Standard specifies the requirements for an environmental management system
that an organization can use to enhance its environmental performance. This International Standard
is intended for use by an organization seeking to manage its environmental responsibilities in a
systematic manner that contributes to the environmental pillar of sustainability.
This International Standard helps an organization achieve the intended outcomes of its environmental
management system, which provide value for the environment, the organization itself and interested
parties. Consistent with the organization’s environmental policy, the intended outcomes of an
environmental management system include:
— enhancement of environmental performance;
— fulfilment of compliance obligations;
— achievement of environmental objectives.
This International Standard is applicable to any organization, regardless of size, type and nature,
and applies to the environmental aspects of its activities, products and services that the organization
determines it can either control or influence considering a life cycle perspective. This International
Standard does not state specific environmental performance criteria.
This International Standard can be used in whole or in part to systematically improve environmental
management. Claims of conformity to this International Standard, however, are not acceptable unless
all its requirements are incorporated into an organization’s environmental management system and
fulfilled without exclusion.
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This part of ISO/IEC 17021 contains principles and requirements for the competence, consistency and
impartiality of bodies providing audit and certification of all types of management systems.
Certification bodies operating to this part of ISO/IEC 17021 do not need to offer all types of management
Certification of management systems is a third-party conformity assessment activity (see
ISO/IEC 17000:2004, 5.5) and bodies performing this activity are therefore third-party conformity
NOTE 1 Examples of management systems include environmental management systems, quality management
systems and information security management systems.
NOTE 2 In this part of ISO/IEC 17021, certification of management systems is referred to as “certification” and
third-party conformity assessment bodies are referred to as “certification bodies”.
NOTE 3 A certification body can be non-governmental or governmental, with or without regulatory authority.
NOTE 4 This part of ISO/IEC 17021 can be used as a criteria document for accreditation, peer assessment or
other audit processes.
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