Some major structures for improving the quality of software are described. It is noted that defects in software are the result of imperfections in the development process and that high quality is achieved through aiming for a better process. Structures are introduced in the product structure, the product architecture, and the work processes. As people constitute an essential part of the process, the human error problem and work time constancy are considered. Based on these, structures and general principles for improving quality are explained. Progress is attained by education in the broad sense. The present work is written for managers in software fields.>

Reports on the quality improvement activities of a Japanese telecommunication manufacturer, focusing on feedback from the field. The authors discuss actions taken when a problem occurs for the particular case of a maintenance system for communication products; the inservice quality improvement committee; and preventive actions. The importance of preventing the design error from occurring again is stressed.>