Janine,
at the moment I am analyzing our scope of checks (TA: OVZ9) for documentation and review issues.
??? Exactly what are you analyzing? What issues? What do you intend to accomplish? What will be the output of this analysis? Who will be the recipient of the analysis?
Finding links between fields in tables is a poor way to determine how SAP software is used to solve business problems. I think you need to first come up with a clear business goal of what you intend to accomplish by the time you have completed your analysis.
With respect to your puzzling Configuration tables, I suggest you enter the tables into SM30, and then hit the "Customizing" Icon. You will be given a list of customizing transactions that manage these tables. From here, you can go into configuration (SPRO) and look at the IMG help on each of these transactions, to get a sense of what business issues are addressed by these transactions.
Or, you may decide you want to get a general sense of availability checking. For this, you should go to the SAP online help, and do some searches. A good start would be
Availability Check and Requirements in Sales and Distribution Pr - SAP Library
Best Regards,
DB49