American Journal of Systems and Software. 2013, 1(1), 11-19DOI:
Abstract: For a purpose of suitable system product acquisition or development successfully, it is extremely important to assess a total quality of system product. And, it is necessary to gather the individual results of measurement to one evaluation indicator through suitable algorithm and assess the total quality of a system. Traditionally, analysis of quality requirements of a product has been conducted through questionnaires or interviews with customers based on investigator's personal experience. On the other hand, the analysis of quality requirements for system is a very difficult work because it is non-formulaic and demands much of product customer's technical perceptiveness. For the purpose of improvement of these issues, we have been working in ISO/IEC JTC1/ SC 7 WG 6, and have developed the techniques for quality requirements and evaluation of system based on the ISO/IEC9126 quality model that includes six characteristics, which is widely recognized. However, independency among each six quality characteristic has not been confirmed and the suitability of quality model for quality requirement has not been certified statistically. In the precedent study, we have verified the suitability and effectiveness of quality model of system defined in ISO/IEC9126 statistically. However, even if each quality can be evaluated from the view point of six quality characteristics separately, but the general method of assessment for total quality of whole system has not been established. Therefore, quantitative and objective assessment or comparison of a total quality of final developed whole system has been extremely difficult work for developers or acquirers. For the purpose of solving this kind of issues, this paper proposes the method of implementing the global quality assessment indicators for evaluation of total quality of system product from the view point of six quality characteristics. Furthermore, this paper proposes the result of verification about effectiveness of method for implementing global quality assessment indicators and usefulness of adaptation of method to predicting total quality of system product.