This study discusses the continuity of design process of Aldo ROSSI (1931-1997) during May 1971 to 1972, from San Cataldo Cemetery in Modena (design competition in 1971) to Elementary School in Fagnano Olona (1972-76) in terms of design diagram as schéma. According to Seventh volume to tenth of Rossi's diaies titled“ I quaderni azzurri (Blue Notebooks)”, Rossi developed his design for the Cemetery in Modena during the summer and autumn in 1971 and applied axis with symmetrical composition in the plan of “ 〇△□ ”. The axis in the cemetery succeeds the first design of Elementary School in Fagnano Olona, and gradually became deformed in I quaderni azzurri. At first, the elementary school has linear plan with three crossbars, and then the courtyard emerged remaining the perspective of axis of linear plan. At the end of axis, the conical tower emphasized the perspective view with schema of cross. The crossbars of first plan disconnected with the courtyard remained as symmetrical volume in both sides. In this meaning, it is shown that the composition of “〇△ □” in Modena Cemetery was developed into design process of the schema of cross in the elementary school.

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　This paper presents a design principle for constructing a real 3D structure of an endless loop of stairs, one of typical impossible figures. Our structure is different from traditional ones in the sense that there is no discontinuous gaps and consequently we can walk along the stairs. This idea will give a general method for constructing largescale 3D structures of impossible objects with which we can interact, instead of just seeing.

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　The Japanese Industrial Standards（JIS）related to tolerances include（1）the revised JIS B 0401-1: 2016 Geometrical product specifications（GPS）-ISO code system for tolerances on linear sizes- Part 1: Basis of tolerances, deviations and fits,（2）the revised JIS B 0401-2 : 2016 GPS -ISO code system for tolerances on linear sizes-Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts, and（3）the newly established JIS B 0420-1: 2016 GPS-Dimensional tolerancing- Part 1: Linear sizes. The technical contents of these standards are similar to those of the old standards. However, the sentences of the revised and newly established JIS standards are difficult to understand and many terminologies have been changed, causing confusion in educational circles. In this report, examples of the effects of the revised and newly established JIS standards on other individual standards are examined for the purpose of pointing out the defectiveness of these standards and proposing the use of conventional correct terminologies.

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