I will also need to get a Standard Operating Procedure (SOP) together as well. For me to do that here I need to establish general points as well and at what level do I need to start, novice, amateur/apprentice or mid to long term user. A SOP is great and it is nice to have standards, however I struggle with the starting level and will probably go with a mid level user as the starting base. At least they know the basics, planes, sketches, and complex models and assemblies. Training a new employee that has limited SW usage and limited training will cost you tons of training time and a lot of do-over models.
I look at it this way,
1. "Proper" new guy/girl training; does the new employee have any clue or are they competent in SW, otherwise you would need to re-write the entire help book in your SOP.
2. Understanding the "Design" intent which should be determined by the Design Supervisor, prior to the start of any new project.
3. If you have a large Main Assembly, break it out to different Sub-Assemblies and do the interference detection in the sub-assembly level and if you need to run it in the main assembly, you can choose 2 sub assemblies and check the interference between those two.
4. Clearance Detection would be nice, not sure how I would do that...
5. Material check should be very easy if you would use the Assembly Visualization tool, you would need to show one column as material.
6. Fully constrained sketches and parts are like you mentioned
7. Additional features, this is a direct result of "1." above, probably the most difficult in your list, as most people have there own way to do things and with SW you're not stuck doing it one way..
8. Same as "7."
9. Here we would have our purchasing and our manufacturing work order/router being crossed checked directly from the drawing, I would keep it the same, let the purchasing dept check the stock size etc..
10. Round numbers are controlled by the SW options, you can do whatever you want there..
Start every project with a "Main Sketch Part/Skeleton Sketch" and develop your entire model off of that part, that part needs to be in the main assembly and every sub-assembly and all the parts are controlled from that Sketch Part, including depths of extrudes and cuts. This allows for different people to work on different sub-assemblies at the same time, but still controlling the outcome of the final model/design..