The factors affecting tag type selection are read range requirements, sensor requirement,
cost, size, weight, and the type of application. Passive tags are
cheaper than semi-passive or active tags. Tag cost should be considered relative to the cost of the items being tagged. For example, a $100 active tag attached to a
container is economical, while a 25 cent tag attached to a box of cereal may not
be. Some applications dictate the type of tags used