SLA based on custom\custom field value?

Question

JIRA

I'm trying to set up a mail notification on the delay of the task.
Jira SD has a "Time to Decision" field, which is a self-created field.
The task is to adjust the level so.
A ticket has been created, after "Time to decision" it is filled for example for +2 days.
I would like to see the violation of the SLA when these 2 days pass.
I set the starting point to "Request created", skipping the pause for now, I consider the status change to "Solved" to be the stop.
But how can I make the goal field equal to the "Time to decision" field through JQL?
Maybe I'm using the wrong tool to notify an overdue task. If it is possible to do otherwise, then I ask for advice.
Task - receive a task notification,

Answer 1

JSD has a different logic in the database.
An SLA is attached to the ticket in accordance with the specified rule. At the same time, the time to decision parameter is already included in the SLA.
Next, you define the trigger condition and subsequent actions with Automation rules.
Why in this situation you need a custom field "time to decision" - I do not understand.

Answer 2

try the time to sla plugin
or scripting.