The methodology was designed to be efficient and the use of the different types of quantitative and qualitative methods aimed to produce sound and reliable results. The literature review should provide the most fundamental information. The survey, expert interviews and questionnaire help fill in any gaps in the knowledge from scientific literature and web searches. The interviews and case studies allow for the most up-to-date research developments to be included, as they may be unavailable elsewhere. Likewise, the combination of survey and interviews was done to cover any gaps in information from EU countries. Furthermore, the survey provided.
