A Methodology for Interactive Computer Service Measurement A measurement methodology applicable to in teractive computer service is described. Its primary purpose is to enable external, user-oriented assessment of computer performance, instead of the more frequently used in ternal system measurement techniques. The NBS Network Measurement System is employed as the external measurement tool. Example data have been collected and analyzed. A demonstration of the methodology, leading to a pragmatic figure-of-merit evaluation of results, is included. CACM December, 1977 Adrams, M. D. in teractive system, computer service, measurement, performance, external measurement, methodology, measurement model,network measurement system, measures, figure-of-merit. 2.4 4.6 6.2 CA771206 JB December 22, 1977 12:32 PM 2193 4 2894 2319 4 2894 2373 4 2894 2894 4 2894 2894 4 2894 1951 5 2894 2016 5 2894 2894 5 2894 2894 5 2894 2894 5 2894