Hi Franklin,
The SHEILA framework final report (http://sheilaproject.eu/2018/11/30/sheila-final-research-report/) provides some insights about the methodology you could follow. I have not conducted any similar assessment myself so I can not be of much help. I imagine that you could start by looking for national high education associations or organizations, maybe you can channel the project through an existing association instead of contacting higher education institutions individually.