GH TOHIDI - Department of Mathematics, Islamic Azad University, center tehran baranch
S NASROLAHZADEH - Department of Mathematics, Islamic Azad University, centerral tehran baranch

In this paper by considering the cost of non-discretionary inputs and influence of modifying of outputs. We modify the proposed method by Filadelfo and et. Al [1] for determining optimal paths and costs of adjustment in dynamic data envelopment analysis (DEA).

Adjustment, Optimal path, Cost effciency, DEA