This public engagement evaluation guide is designed for anyone, regardless of prior experience with public engagement or evaluation, who leads projects intended to engage with general audiences about science, social science, engineering and technology and the social, ethical and political issues that new research in these areas raises. It is also intended to help project managers evaluate individual projects. Besides detailing the evaluation process, it discusses important topics, such as what evaluation is about and how evaluation can help strengthen funding applications.
UK National Coordinating Centre for Public Engagement (NCCPE), Department for Business, Innovation and Skills (BIS), and Research Councils UK

A common standard for evaluating public engagement with research: new paper by @profmarkreed with @NCCPE, @EngageQM & Dialogue Matters http://ingentaconnect.com/contentone/ioep/rfa/2018/00000002/00000001/art00013;jsessionid=whix95j1u9pw.x-ic-live-01
https://www.publicengagement.ac.uk/do-engagement/evaluating-public-engagement
http://www.rcuk.ac.uk/documents/publications/evaluationguide-pdf/