OK, I've took a big look at this list of assets along with the proposed specialization, and there are not really working for my use case. I don't want to build a mechanism (or use an existing mechanism) that simulate a corporation daily business. What I want is a mechanism to bound, limit and define what my PCs can do with their corporation.
So, in my approach, I would replaced all those assets by operation the group can use. For instance, they want to build a network to provide safehouse, using their coporate assets. So for instance, if they want to know if they can indeed provide a safehouse for their own need, or to help some fellow shadowrun I would ask them to roll (Operations + Safehouse).
They also want to provides a way for Shadowrun to save some money "for their old day", so I would make a "Money Laundery", and ask them to roll Fiscal + Money Laundery.
This way, instead of keeping a large list of corporate domain, that will most likely never be useful to my PCs, I would just come up with "skills" every time they want to do something. Rather than skill I should probably call them "Shadows Ops".
As for representing for the competency of the corporation to do its business, I would make it an attribute test, like Managemement + Efficiency, and to resist attack from other corporation Security + Intelligence.
Last, but not the least, I need a mechanism to limit the number of time they can tax their corporation for resources. Earlier I though about having such use consuming resource, but I'm thinking (again) having a drain system. Like every use of a Shadow Ops will generate a Drain score to be resisted by Fiscal + Operations. If Drain Score (acting as a Threshold) is not met, the corporation can not spare more resources before next month. Glitch and Critical Glitch in resisting "drain", will cause "harm" to the corporation.
Maybe I'm wrong, but this approach seems a bit less complete (in term of simulation) but also limit the number of skills to keep tracks off, plus leverage as much as possible the attributes.