Defect reduction in VSE-methodology and results

Abstract

In 1990 and 1991 activities have been defined to improve the quality of VSE, one of IBM's operating systems. As a first step, all defects of the past 10 years of the VSE supervisor have been analysed and categorized using the Orthogonal Defect Classification system. This analysis and an additional review of the development process lead to improvements in the areas of defect prevention and quality tracking. The result of these improvements is very encouraging: the defect rate of VSE has been reduced by 94% compared to 1989.