A good evaluation starts before the event: define in advance what success means and how you'll measure it. Send a short survey straight after the event, five questions maximum. Also measure objective data: attendance rate, engagement during the programme, media reach.
Evaluate internally with the team: what went well, what could be better? Use the findings straight away for the next event. An event without evaluation is a missed learning moment. Live Impact delivers an impact report with recommendations after every project.