As one of you commented on my last post – writing the CAD Standard is a major accomplishment, but keep it up to date is another.
When you finally have a Standard in place – when should it be updated?
Last November I posted – CAD Standards – Not Set in Stone 
This post talked about some of the milestones that may trigger a rewrite or update. Take a look and see what I mentioned.
Other items that may trigger a rewrite?
When a new CAD Manager takes over. If you have just started your tenure with a firm, this is a good place to start. Take a long look at the existing standard and find out what people think should be changed.
After an Acquisition. If you have just merged or purchased another firm – take a look at their CAD Standard and pull out the best ideas.
Can you think of any more?