Page 14 - BIM and ISO 19650 from a project management perspective

In the past, with drawings, the ‘granularity’ of information was determined by scale or
by a person’s capacity to draw and to read a line on a drawing. Standards such as BS
(British Standard) then specified the information to be attached. With digital informa-
tion, however, there is no physical limitation. The purpose drives the information to be
embedded in the model. The level of information need is therefore developed to assure
that the information is implemented in the model at the time it is needed to fulfil its pur-
pose. It should take into account the specificities of data drops, domains and BIM uses
which cannot be covered by single parameters, such as level of development (LOD
6
coming from BIM Forum ) or level of detail (LOD coming from CityGML ). The European
7
Committee for Standardization (CEN) is publishing a guidance document to support the
level of information need concept.

6 BIM Forum : https://bimforum.org/2018/12/04/2019-draft-lod-specification-released-for-public-comment/
7 CityGML: https://www.opengeospatial.org/standards/citygml

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