Products and services which are regularly stolen are known as hot products. They have characteristics captured in the acronym CRAVED. Concealable, Removable, Available, Valuable, Enjoyable, Disposable. The craved concept allows the problem of theft to be considered on a product by product basis. A good design is one that hardens the target and increases the risk for someone trying to steal it while a bad design is one that does not have these attributes. For example, an MP3 player is a bad design because it meets all the characteristics described in the acronym CRAVED.
An air-conditioning unit though valuable is not easily movable and may not be as enjoyable as an MP3 player. The feature of product in crime is that some products from their design, present more opportunity to criminals than others. The overall goal of crime proofing by design is to make crime less attractive to offenders by increasing the risks and effort. These crime proofed products are more difficult to steal or to use to commit crime so crime is reduced because criminal elements keep away from them.