Quick Reaction Alert
Is a 3 minute alert posture by the RMAF possible?
Yes, but consider what they need for 2 aircraft.
This is cockpit readiness. Assume a rotation of 2hrs on and 4hrs off. You need 6 crews per day and 12 for 2 days. That is a crew/aircraft ratio of 1:6. Then you have crews under taking routine training on leave etc.
A more normal peacetime readiness is Crewroom readiness - typically 15 minutes - but you still need 4 crews per day as a second pair would be on one hour. Typically you still need 6 crews in 2 days.
Small air force's would struggle to meet the task.