When discussing surveillance systems, most people think about a very basic set-up which records those in a certain area, and maybe stores that recording within a database for a while. This is certainly effective in most situations, but if you’re working in an environment which has greater risk of foul-play and theft, then you may want to invest in more advanced technology, which often means greater sensory capabilities, as well as even a computer processor backing it all up, trying to make sense of the information.
Advanced surveillance systems will often try to record data from more than just the basic visual information that your typical system will attempt to. This could mean a infra-red sensory capability, or even something like a scent sensor (which is quite a recent invention and still not perfect). If you include this with advanced computing technology which is able to compile this information and build a profile of individuals within its sensory field, then you have a highly effective system.