Sales revenue: An event management system should help your team book more events and pull them off more successfully, so you should see revenue growth after implementing one. Tracking your sales revenue, especially year-over-year, will help you determine the impact of this technology partner.
Client satisfaction: Sending surveys after your events is a great way to collect client satisfaction data, and you can monitor this data to spot trends and determine if your current processes are working. Ideally, client satisfaction will increase after you implement an event management system.