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The thesis data were collected across five sequential stages and based on a mixed-methods Delphi study. The five stages were: Workshop, Pilot Survey, Main Survey 1, Main Survey 2 and In-Depth Interviews. The latter two stages were only completed by defined experts, the parameters of which were established at completion of the Main Survey 1. Participants were mostly academics and postgraduate students with a knowledge and/or experience of aviation, although there were also smaller cohorts of aviation industry insiders and aviation industry consultants. |
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