To summarize, the Delphi technique is a research approach to gain consensus using a series of questionnaires and the provision of feedback to participants who have expertise in key areas. This method is especially useful when researchers need to collect ideas from isolated experts on a specific topic and establish agreement to discover the underlying assumptions or perspectives among the experts. However, the major weakness of Delphi is the lack of a theoretical framework. Delphi as a research methodology has been variously presented as a survey, study, procedure, method, approach, polling, and technique. Nevertheless, it is generally acknowledged that the Delphi methodology is not uniform in its application