In order to meet the increased demands for greater productivity and accountability in the current economic environment, security managers need to gather better information and manage and control security functions more efficiently. A microcomputer is ideally suited to this function; presents the least initial cost; and can be used to extract and manipulate information about utilization, problem identification, and operator efficiency. It can also be interfaced with other information systems within the organization. Existing software can provide a wide range of research, budgeting, inventory control, and scheduling functions. The methods of interfacing a microcomputer with an existing computer-based security system include connecting a part of the security computer through a multiplexer to a microcomputer or to a disk drive storage device; or transferring data at high speed through a multiplexer and line drivers into buffers at a remote location. This latter method provides the greatest flexibility and speed and permits data to be loaded from the security computer to a buffer on a scheduled, unattended basis. Purchasing a microcomputer can be justified by identifying and documenting the need and rationale; investigating and documenting potential effects on staffing; and listing potential uses, including work flow schedules, productivity aids, personnel files, inventory controls, and accounting and charge-backs, among others. A design criteria statement should describe the exact microcomputer system requested and how it will be incorporated into the existing system. Diagrams and illustrations are provided.