Hardware

Hi there,
I am in the process of developing an organizational processes a definition for desktop administration. Define important issues and the resolutions. few question comes in mind are :
1. Who should be responsible for decision and changes?
2. Should there be a computer usage policy?
3. A white list of hardware and software?
4. Should administration team be aware of Service level Agreement?
5. What and how change and configuration management should be implemented?
6. What and how and to whom delegation takes place.
7. A Central point for incoming and outgoing information.
8. A documentation process.

And I think there should be many more issues to consider. I am hoping you all out there to help me, to find out those issues their solutions in means of framework, site, book, template, project report, suggestions and advices.

Greetings
Shashi