Before you can evaluate your ticketing system, you need to define what you want to achieve and how you will measure it. Some common goals and metrics for customer service ticketing systems include customer satisfaction, resolution time, first response time, backlog, and quality. To measure customer satisfaction, you can use surveys, ratings, reviews or testimonials. To measure resolution time, you can use the average, median or mode of the time spent on each ticket, or the percentage of tickets resolved within a certain timeframe. For first response time, you can use the average, median or mode of the time between receiving a ticket and sending the first response, or the percentage of tickets responded to within a certain timeframe. As for backlog, you can use the total number of tickets in your queue or the percentage of tickets that exceed a certain age or deadline. Lastly, to measure quality, you can use the number or percentage of tickets that are closed, reopened, escalated or transferred, or the number or percentage of tickets that result in refunds, cancellations or complaints.