In a bigger office, I can see DWorks point - with people working differently, the system probably will end up somewhere in between a detailed list of layers/classes and a simple one, where everyone can agree.
I gather the over riding goal is to use as few as possible but enough to separate the drawing into logical chunks?
I am a one man office after parting ways with my drafter who preferred to start anew in every document. I can never find layers, etc. because he used a unique name every time that suited him that day!
I do more landscape work and have read a few different takes on layers/classes that kind of work. Arhonocad manuals suggest floors for architects and work groups for LA's
I have set up my classes to follow all the items on my standard bid form, also using prefixes matched to the schedule (i.e. D for Drainage, just like my bid form) so they show up in order I am familar with in the drag down menu. I also use hyphens to create classes, sub-classes and sub-sub-classes (for example Drainage-Pipe-12")to reduce scrolling through a mile long menu.
As for layers, do most of you have separate layers for grading, drainage, planting, irrigation, etc. or do you just follow the design process - base maps, analysis, prelim, and construction dox and let the classes, visibility settings, etc. separate work items?
Thanks in advance!