The purpose of this article is to examine the making and development through the pattern in which the roof tiles have been produced and distributed in the area of Kyungju. According to the technical characteristics and combination patterns of the flat and Roof-end tiles, the tiles were divided into three main types. The author examined the method of production by system. As a result, it was found that each tile making responded to the tile demand throughout the capital by sharing information such as standard, wadang patterns, and the use of early rock mules, while maintaining independent production based on different manufacturing methods. Later, at some point in the 7th century, tile-making methods are stereotyped, existing sizes are changed little by little, and there is a change in the appearance of low-grade wadang patterns that are easy to distribute and use, regardless of differences in production relics. This means that there is a governmental system of production in the Gyeongju area and multiple groups of tile makers are incorporated into the system. In other words, similar changes in the system are being identified in the same period Baekje and Ginai in Japan in a way that leads to the efficiency of the production and distribution structure through institutional readjustment rather than dismantling existing groups. With the advent of tile styled of Reunified Shilla another change occurs in tile production. From the late 7th century onwards, it is a change that focuses on the visual aspect focused on design, including the creation of new and diverse wadang patterns for a certain period of time, the replacement of Wabum structures to effectively decorate them, and the use of differentiated tile components. But this pattern does not deviate significantly from the framework of the state-run production system formed seven centuries ago. The analysis of the two cases of Jungbyun structure s Yeonhwamun Roof-end tiles shows that a number of Wabums and Roof-end tiles were produced in common at various production sites, and this phenomenon is not much different from those of the Silla-styled Yeonhwamun Roof-end tiles dating back to the 7th century. However, the willingness of those days to produce quality roof tiles with elegant patterns rather results in the concentration of some groups of productive forces, such as pottery sites of Geumjangri and Dakyung. Intensive production of the engraved Amkiwa in the 8th year of Uibong is also the result of this transition. Later, as the 8th century entered, tile production was reorganized: the flat tiles were produced fewer and their weight became lighter while the design was schematized. If reflects the tendency that the functional value was prefered.
Development of redesign method of production system based on QFD