The most common errors are:
• Whole project stage is defined with single LOD, e.g. LOD 300. In reality at any project stage & discipline objects are at different LOD’s – walls LOD200, furniture LOD300 etc.

• Defining LOD for whole discipline e.g. LOD 300 Arch. model. This could be used to define LOD for Scan to BIM projects or some other one-time modelling activities, but not for the design process which consists of different stages

• The specification is to be used with the excel table which is filled in prior starting a project. We have never seen this done because it is a very time-consuming task.

• Defining LOD500 in the design phase. LOD500 is the LOD for objects that have been built and represent the situation in reality. Something that is not possible in the design stage.

In our classes we give the students an exercise – evaluate LOD of defined objects by visually looking at them. The results are always the same – there are many different answers, meaning that it is almost impossible to easily tell if an object is at the required LOD.

In the picture you can see an example of incorrect LOD usage in a real project.

Do you have any examples of incorrect use of the LOD specification?