The escalation service allows you to define a process for modifying issues after a certain time has elapsed, useful for business procedures that require that tasks be completed within a certain time (service level agreement). For example, if a task has been opened but not assigned for 7 days you could automatically move it to a "Prioritise" status, or add a comment which will cause an email to be sent.

Or you want to send an email to the QA team if a ticket has been Resolved for 2 weeks but not tested yet.

This is a far easier alternative to jelly escalation.

To get started, navigate to Admin → Built-In Scripts → Escalation Service.

No services will be defined initially, so click on New Service.

Enter the following parameters:

description

just a note for your own benefit, eg: "Support reminder service"

JQL Query

You will normally want to specify an "updated" clause, eg status = Open and project = XYZ and updated < -7d. Test your query in the Issue Navigator first.

User ID

Enter the ID of the user that the service will run as. You need to provide a user that has permission to transition the issue, or comment on the issue or whatever.

Define a user called automation or similar, give it admin rights and developer rights in every project, and use this for the service user.

Note that admin users typically don’t have permission to transition issues in every project.

Interval

How often the service should run, in minutes. The shortest duration you can use here is 1 minute.

Action

What action do you want to run on the issue? This is optional, you can use Additional Issue Actions instead or as well as

Additional Issue Actions

Run some addition code as part of the transition. Typically that involves calling methods of the passed in issueInputParameters - see the examples for sample usage.

Clicking Run Now will run the service with the parameters you have entered, but will not install it as a service.

The service could potentially operate on a large number of issues depending on your query. Make sure you test the query first in the issue navigator.
It might be useful to test the service in a copy of your production environment first

If selecting a transition action you should verify that the particular action is valid for all issues that you are matching on. For instance, although multiple statuses might have a Close Issue transition, it will need to have the same action ID, ie be the same action. If not, you could either modify the workflow or use two different services, with queries that select the two different states.