@Surrogate:
Thank you very much for both replies.
I voted for each issue

All shown Topics by you could be possible approaches.
But they require an user-interaction, which can result in difficulties or might be forgotten

I must begin with a little background Information.
In our Company (1200 employees, 80 Engineeres in 5 Locations (Germany, China, USA, etc.) with R&D) we develope and design several different components.
Futhermore we have a advance developement for electrial devices. The colleagues in this department work with a Special ECAD-Application. But indeed this Software is very cost-intensive. However for this it is justified, because they have increased demands.
Moreover, we sometimes have the case, that a mechanical design engineer have to Show for example a control cabinet.
- How to wire components
- Where to Position relay, SPS, etc.
- ...
» A simple circuit diagram for assembly and the customer.
So he only have to Show the Status quo of mechanical design. It is not a electrical developement in the proper meaning of the word...
In former times we used AutoCAD for this issues. But it is not so Handy and comfortable compared to MS Visio.
Because of this it was my idea to introduce MS Visio for this matters.
As a member of the R&D-Management i have the honourable Task to to take all the preliminary steps

What I have prepared until now:
- Implement Visio-Files in our PLM-System (Documents can be created, released, versioned, pre-viewed, etc.)
- create autofilled title block and drawing Frame in Visio (DIN conform)
- manage stencils (with a vast amount of customized shapes) global
- distribute GUI via clientmanagement
- created Interface to CAD
- Part list can be created automatically in Visio and Export to ERP-System
- create several usefull macros
Tbd:
- Centralized Management of backroundpages
- Centralized Management of VBA-macros
- ....