The problems experienced with technology often are not inherent with the products themselves. Instead, they result from faulty assumptions underlying their selection or application. Corrections officials must recognize that no device will eliminate the need for an adequate number of well-trained and properly supervised staff. The main sources of failures in the use of technology have included inappropriate applications, operational problems, and poor followup service. However, positive experiences can be ensured by defining needs clearly, asking companies to develop products to meet unusual needs, checking references on products, carefully evaluating each crucial factor, prequalifying manufacturers or contractors before seeking bids, obtaining opinions from line staff, and carefully inspecting a system before accepting it.