Drawing on our model basin's large database of experimental results this paper explores several options for reducing the EEDI. Starting from the equation that defines the index we present four of the many ways to achieve such a reduction: • Reducing the power demand of the hull by optimising main dimensions • Increasing the product of speed and deadweight • Classical hydrodynamic hull form optimisation • Tailoring the 'sea margin' of the engine power to the requirements of the ship on the intended route Using a practical example for each option it is estimated by how much the EEDI can be reduced. © 2014: The Royal Institution of Naval Architects.