Abstract
NTT DATA SYSTEM TECHNOLOGIES INC. is engaged in the development and maintenance servicing of banking systems. The banking systems are always facing risks of one error directly resulting in a serious trouble of incorrect transfers. The banking systems have already become part of the social infrastructure and are inevitably demanded to be robust and in high quality. At development sites, activities are undertaken to accomplish processes at a high accuracy by defining each work process in detail, going back to the stance of thoroughly executing basic operations. These activities and the future direction are described.
