A methodology for computer service selection
Dennis E. Witte · 1983
The specific problem studied involves a procedure to determine which computer service alternative is the best choice for a given user situation. The general problem addressed is the need to choose computing hardware, software, systems, or services systematically from a user perspective, considering cost, performance, and human factors. Most existing methods consider only cost and performance factors, combining these factors in ad hoc, subjective fashions to reach a selection decision. By not considering factors that measure effectiveness and functionality of computer services for a user, existing methods ignore some of the most important measures of value to a user. In this work, a systematic and comprehensive approach to computer service selection has been developed and is presented. Methods for selecting and organizing evaluation criteria are shown. Techniques for the measurement of both quantitative and qualitative service attributes are developed. Also discussed are ways to assess the importance and value of different service attributes to a user. Procedures for combining evaluation measurements into a well-founded decision are illustrated. Finally, a computer-based decision support system is described that provides a powerful, flexible decision environment for the storage and processing of evaluation information. This thesis demonstrates the feasibility of a systematic approach to computer service selection. The general methodology is established and specific applications are demonstrated.