JIRA allows/requires a lot of project specific configuration (workflows, issue types, custom fields ...). Changes to this configration requires a JIRA administrator.
We have decide if we setup a central service unit that does the job for the entire company; or if we have decentralized, domain specific JIRA administrators which to the job locally. It would be nice, if someone could share his experiences. I would also be interested in the average effort that we have to calculate for such a configuration service.