Abstract: This study presents a framework to evaluate factors influencing implementation of urban plans. An integrated Delphi-AHP method is utilized to identify important factors and their quantitative importance causing failure of urban plan implementation. Delphi method has been used to survey major factors and Analytical Hierarchy Process (AHP) method has been utilized to define their significance, in a case study for Tehran. This study outlines the core factors that affected urban plans implementation failure. Obtained results provide proper insights to increase success of urban plans to achieve their goals. Although, Delphi and AHP are established methods in many literatures, rarely utilized for identifying and weighting factors causing failure of urban plans at implementation phase.