Originally Posted by EASA
It is therefore recommended that operators review and amend their operations manual procedures, as applicable, so that take-off slats/flaps selections are made before the aeroplane taxis away from the ramp
Good idea. On my previous type, we selected flap during taxi out. The takeoff warning saved us a few times. On my current type, the FO doesn't select the flaps until the captain has armed the spoilers and the captain doesn't taxi until the flaps are set. Works much better; much lower error rate.