This study aims to determine the effectiveness of the Delphi Technique as an educational planning tool. The authors investigated the perceptions of sixty-two pre-service school administrators who would most likely use the Delphi Technique for educational planning purposes. They were invited to participate in an actual Delphi Technique implementation process before they were asked to provide their responses to the research survey questions. Data collected in the study were carefully examined by coding category and identification of major themes to answer the research questions. The findings of the study have indicated the major strengths and weaknesses of the Delphi Technique. Most research participants agreed that Delphi Technique effectively sought consensus among diverse experts. The limitation of the technique was identified to be tedious and time-consuming. The research participants also recommended to improve Delphi Technique by allowing longer lapse of time between rounds of survey. However, they clarified that Delphi Technique did not fit all educational planning situations. The technique works best in planning situations of seeking for prioritization of possible options.