Another problem with the Delphi technique is a scientific method for determining the level of consensus. A variety of methods has been proposed in different studies. Some researchers have determined Delphi rounds as a basis for reaching agreement. Between 2 and 10 rounds have been reported in various articles [53]. Fan and Cheng have believed that research has shown that three rounds are adequate for the Delphi technique [40]. Some also argued that the traditional Delphi contains four rounds that researchers have shortened it into two or three rounds to achieve the study's objectives [54] [5]. Such an approach is a target displacement. In fact, reaching a consensus is a basis for the end of Delphi rounds while in this approach doing a certain number of rounds is regarded as a basis for reaching an agreement. So, another solution must be identified to reach consensus. In a study, according to 114 articles about the Delphi technique, von der Gracht (2012) has presented 15 ways to achieve consensus [9].