Introduction to LOD
Level of
development (LOD) is a designer’s guide to correct detailing and information
integration of Discipline models. It is a tool for agreeing on the development
level of data models within a project. Therefore, LOD sheets must be defined in
cooperation with the customer. LOD is a measure of how seriously you take
the information represented by a BIM element. It is not necessarily a measure
of the amount of information, although obviously there must be enough
information to satisfy the specified LOD level. The LOD is divided into three
measurable sections:
1. Level of Information describing the
information level (LOI)
2. Level of Graphics describing the
graphical detail and (LOG)
3. Level of reliability dictation how
accurate the data is. (LOR)
LOR is not integrated in the materiel represented on this site yet.
General description of LOD levels
A general specification of the LOD levels has been made to support the individual description of eath dicipline model. The specific description for eath model will always overrule the general specification.
The specification defines the elements LOG and LOI. The levels are not fixed to any specific project phase, resulting in a flexible system where any LOD can be chosen to any given project phase. The highest LOI level specified in this release is LOI 300. If the LOG level doesn't have a corresponding LOI on the same level, the model must have an LOI cooesponding with the highest LOI level for that specific model.
The ICT of the induvidual project defines the LOD levels of the relevant models.
LOG 100

LOG 200

LOG 300

LOG 325

LOG 400

2D geometry
represented as points, lines or polygons, or schematic diagram.

3D geometry
where elements
are generic placeholders.
They may be recognizable as the components they
represent, or they may be volumes for space reservation

3D geometry
represented as correct outer geometry.
They must
be recognizable as the components they represent.

3D geometry
represented with correct detailed outer geometry.
All details must be
recognizable as the components they represent.

3D geometry
where elements
are modelled at sufficient detail and accuracy for fabrication of the
represented component, including all related elements e.g. reinforcements,
bolts and internal wiring.

LOI 100

LOI 200

LOI 300

LOI 325

LOI 400

DDA layers
Geometrical
parameters e.g. radius, area

DDA layers
Geometrical
parameters e.g. radius, area, volume

Pending

Pending

Pending
