  This study modifies the Russell graph measure of efficiency to find the
closest target from the assessed decision-making unit to the efficient frontier
of an empirical production possibility set using an extended facet approach.
The closest target requires a single improvement in either an output term or an
input term, and needs some positive levels of all inputs to achieve the output
target. The practical advantage of the proposed efficiency measure is
demonstrated numerically in comparison to other existing non-radial efficiency
measures.
