Redesigning a Computer Workstation using Computer-Aided Design: A Case Study

Abstract

The purpose of this case study was to modify the layout of an existing computer workstation based upon human factor/ergonomic guidelines using a Computer-Aided Design (CAD) system. The computer workstation of concern was an educational teaching/demonstration tool used in the Department of Technology of a midwestern state university. The computer workstation consisted of a microcomputer, keyboard, a 63.5 cm (25 in.) diagonal high resolution monitor, a digitizer tablet, and a plotter. Instructors using this workstation were surveyed to determine complaints associated with the original computer layout. The original workstation configuration was measured, entered into the computer, and modified based upon anthropometric and ergonomic data from the literature. While numerous ergonomic variables were evaluated, operator reach and distance from the monitor were the primary variables determined to be of concern. Reach parameters were based upon recommendations for users falling in the 50th and 95th percentiles. Distance from the monitor was established by trial and error methods based upon user recommendations. Three-dimensional views of the proposed computer workstation configuration were then generated by the CAD system. Results indicated the usefulness of CAD as a tool in the design and modification of man-machine systems.