Setting Request item and SCTask short descriptions based on a variable field

[Moedeb]

I have been trying to set the short descriptions of both the request item and the resulting task based on a variable field, however nothing so far has worked for me.

I have tried adding business rules, but they never seem to fire, I've tried adding a create task as part of a new workflow, but it just hangs at that stage of the workflow.

I've tried: https://community.servicenow.com/community?id=community_question&sys_id=b9fd87addb9cdbc01dcaf3231f96...

Also: https://community.servicenow.com/community?id=community_question&sys_id=e94ffa69db58dbc01dcaf3231f96...

The variable that I'm using is called:

brief_description - (text line)

I would prefer to simply update the task that is automatically created when the workflow runs and not creating a new workflow to create a task as part of it if possible?

Some really detailed instructions/screenshots would also be very much appreciated lol

Thanks in advance

[Moedeb]

You are a legend, thank you very much it is working perfeectly

[Moedeb]

Sorry one more question.

If I want this business rule to only run on specific catalog requests or even only where a variable called brief_description actually exists how would I do that?

The problem I have right now is that it is actually blanking out most short descriptions currently as the variable brief_description doesn't exist on them.