A320 - After landing - 3min for thermal stabilization, then SE taxi. Yellow pump on, Eng Master 2 off (on CA's command when not using brakes), crossbleed open. No APU unless ground power not available at gate.
We've saved a lot of fuel since we implemented a SE taxi policy.
In the past, when taxiing for departure we were told not to use SE procedures unless the delay was over 40 mins. That was rethought and the policy now is SE unless the taxiway/ramp are contaminated or engine anti-ice is needed. Otherwise, time your #2 start to give yourself enough time for start, 2min warmup (if engine shutdown less than two hours prior), and all procedures and checklists.
