This paper draws the author's involvement employing the Delphi method, as the measuring tools in the field of tree vandalism research. Attention is given to aspects such as the selection of method, design of questionnaires, selection of experts, the communication between survey administrator and respondents, and also the analysis of experts' responses. Some of the challenges faced during the surveys are the way they were treated with, and risk mitigation approaches used by the Delphi coordinator are highlighted too. The principal objective of this article is to contribute an insight that can encourage other researchers or practitioners planning to apply the Delphi technique. Furthermore, the article gives to the methodological discussion by revealing the elements of innovative practices that can help overcome some common consequences of the Delphi: electronic mail and web-based surveys and the two round structured questionnaires.