Breakable dependendies due to layer states

Hi All,

I am currently working on some assemblies in Creo 4 that were created in Wildfire 4. Many of these assemblies have several (500+) breakable dependencies due to layer states.

I have been looking for more information about these dependencies, but haven't been able to find much. I am trying to determine, how are these dependencies created? How is it that some of these assemblies have so many? If I break the dependency what happens? Any information about this would be great.

Thanks in advance!