SLA escalation before resolution time elapse

SLA escalation before resolution time elapse

I would like to setup a SLA where a resolution time is 5 days, but would like to escalate 2 days before. How would I setup SLA using escalate before 2 days?

There is also a similar setup for SLA where a matching request should be resolved within 1 day; however, need to escalate within 1/2 hour, i.e. setup escalation before 23 1/2 hours.

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