A new model of ambulance services is to start today.
Targets for response times are dropped for all but the most life-threatening calls - 'Red' calls.
Health Secretary Vaughan Gething has said he has given the go-ahead following a successful pilot.
The response model moves away from historic time-based targets for all but the most immediately life-threatening or ‘Red’ calls.
Mr. Gething says it now places a greater focus on patient outcomes, prioritising those in most need of an urgent response.
The target is for 65 per cent of the most urgent ‘Red calls’ to be responded to in eight minutes.
Since the trial started in October 2015, the 65% target has been achieved each month.
Performance has continued to improve and in each of the last 9 months, more than 75% of red calls have received an emergency response within eight minutes.
Watch James Crichton-Smith's report here.