PLANNING AND IMPLEMENTING A MICROCOMPUTER LOCAL-AREA NETWORK

Factors to be considered in planning and implementing a microcomputer local-area network (LAN) in a pharmacy department are discussed. Reaso ns for implementing a LAN include the ability to share data, programs, and peripheral devices among multiple users. The network operating sy stem may be full featured or a peer-to-peer system. Full-featured netw orks require a dedicated file server but are more powerful and versati le. The file server, if used, is the most important piece of equipment . Factors that affect the choice of a file server are the processor, t he bus, memory and speed, the supplier, and the power supply. It is ne cessary to select network adapters and wiring and to decide whether an y of the department's current computer equipment will be used in the n etwork. Decisions must also be made about software. The equipment shou ld be set up by the computer services department or a vendor. Two or m ore pharmacists must be appointed and trained as supervisors to manage the network, diagnose and correct problems, perform network backup, a nd guard against computer viruses. Security is a major concern because of the need for confidentiality, the licensure of software for only a limited number of users, and the risk of inadvertent alteration or er asure of data. Network users must be trained to use the system properl y. Department managers should consider the need to access the LAN from computers outside the department and the possible incorporation of th e LAN into a wide-area network. A microcomputer LAN can provide valuab le information services, but careful planning is necessary to avoid pi tfalls and to ensure that the network meets current and future needs.