Best practice for managing change requests in Jira

[Crisan Hristea Carolina Sarah]

Hello,

I have an internal discussion with my team mates to find out which is the best and optimal way to organize our teams. 

We are a Change Management team and will propose a new way of using Jira to the rest of the employees.

First option is to have one Service Desk which will be used by the entire company. Minuses here are: 

All departments + bands have access to change

Visibility

Second option is to have one Service Desks on each project(team). Minuses here are: 

all departments have access to the band project

disorganization

configuration

administration

As a note, one change ticket will be used by multiple departments(CMS, R&D, ICT + others ). Who has access in the CMS project should not be able to change the project settings just pick up requests and edit a certain queue.

Is there anyone who has any suggestion on this organisational idea, pros vs cons on each option ? which one is the best ? I tend to chose first option as it looks more convenient and organised.

Thank you in advance,

Sarah H.