Determining whether upgrades or bug fixes are required:
What criteria will your organization use for determining this to ensure that it is minimally disruptive to the organization, but still gaining benefit of upgrades/bug fixes when necessary?
Upgrade process /bug-fix process:
Who will be responsible for making sure that this is executed successfully at your organization?
What will the process be?
What type of test hardware is required to do acceptance testing on an upgrade/bug-fix?
What kind of user acceptance testing and training will be done for upgrades?