Actually officers are rated responsiveness to calls for service, thoroughness reports, report follow up and cases cleared, citizen complaints, volunteerism, teamwork, extra classes and training, how often they call in sick, appearance (uniform cleanliness and equipment in good condition, and use of time (need to demonstrate you are not just sitting on your ass between calls, so you can do traffic enforcement, warrant service, community engagement, etc.) All officers are different in their particular interests.  I used to do traffic enforcement inbetween calls.  Others would look for street dealers or patrol high crime areas.