What is engine-out taxi out time?

a) The time between the first movement of the aircraft under it's own power and the start of the last engine

b) The time between the first movement of the aircraft regardless if it's being pushed back without any engines running and the start of the last engine

And one additional question - how would you define the the start of the last engine?

a) The moment the fuel valve is opened

b) The first moment the engine is running (stable N1, fuel flow, oil pressure and temperature, etc.)

c) Something else

What is engine-out taxi out time?

a) The time between the first movement of the aircraft under its own power and the start of the last engine

b) The time between the first movement of the aircraft regardless if it's being pushed back without any engines running and the start of the last engine

And one additional question - how would you define the the start of the last engine?

a) The moment the fuel valve is opened

b) The first moment the engine is running (stable N1, fuel flow, oil pressure and temperature, etc.)

c) Something else