While system functionality evaluates whether or not the equipment is working, system performance seeks to identify how well it is working, particularly in your specific application. This type of evaluation will look beyond the quality of a camera’s image to determine the effectiveness of a camera in each particular location. Adjustments such as lens or equipment changes, or even repositioning the camera help increase usability and overall effectiveness. Similarly, recording duration, frame rates and compression quality should be looked at on digital video systems to see if you’re using the products effectively.