I am in general fond of JIRA Scemes - but not the Permission Schemes, because in general permissions vary pretty much - even for quite similar projects.

So I tend to extend the JIRA Roles pretty much in an (almost) 1:1 relation between JIRA Permissions and Roles.

The Standard Permission Scheme

Look more or less like this:

 

Create Roles for Standard Permissions

For these permissions, I create a Role for each - sometimes with a little more descriptive name:

Create a New Rolebased Permission Scheme

Create a "Rolebased Permission Scheme", and Add the Roles to the equivalent permission:

Until all (that You want) is added in the 1:1 relation:

 

Assign the Scheme to a Project

After the new Scheme is assigned to a project:

You can now assign users and groups directly to the project, making:

• Overview / resolving of permission issues easier
• Changing permissions for one project very easy/fast