The precut-processed lumbers are carried from a precut factory to a construction site after cutting in a precut factory. To enhance the construction efficiency in the construction site, the precut-processed lumbers should sort in the order of the usage. On the other hand, for the efficiency of transportation, it is necessary to lower the height of the packaging lumber. In this research, therefore, we propose a heuristic method for stacking lumbers. In this method, we determine the position of lumbers without inclining while inserting supplement lumbers, according to the order of the usage of them.

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Computer aided automation was developed for designing and manufacturing frame members of the wooden Japanese house built in the traditional style of construction. The total system includes a computer system which process the design and manufacturing data, a data station that takes care of the data transfer and an automatic cutting machine, so-called "Precut Machine" which performs the machining of the frame members. For processing the design and manufacturing data, a data structure was proposed for classification and storing the input data which is prepared in an interactive graphic manner. Furthermore, based on the survey and discussion on the various existing patterns of connecting frame members, computation algorithms and data structures were developed so that a connecting pattern and its corresponding machining program can be automatically generated for all the connections to be worked for building a given house structure. System software was implemented in a cost effective personal computer system. By linking the personal computer with automatic cutting machines via the selfdeveloped microprocessor-based data station, an evaluation test was performed. Results have shown a remarkable increase in productivity of designing and manufacturing members of wooden Japanese houses.

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As precut-process lumbers are packed and transported to the construction site, it is necessary to determine the packing style in consideration of the balance of the center of gravity, the ease of picking at the construction site, and the efficiency of the transportation. In our previous study, we proposed a rule-based stacking algorithm to determine the packing style of rectangular lumbers from the bottom side, but it was necessary to take into consideration the relationship between the upper and lower lumbers for preventing the inclining or dropdown the lumbers. In this study, we determine the packing style from the top side to simplify the relationship between the upper and lower lumbers. The effectiveness of the proposed method was validated through computational experiments.

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　1章では，木材加工の機械化技術の流れを振りかえりながらプレカット工法の技術特性と木造軸組工法の生産システムに及ぼした影響について考察，概観し，本調査の視点となる要素を抽出した。2章では，限られた地域で比較的まとまった戸数の木造軸組工法住宅を生産供給している｢地域ビルダー｣の業態調査の結果である。生産規模が比較的大きい（百戸以上）のビルダーほどプレカット工法の導入に積極的であるが，業態が注文主体か，建売主体かによってプレカット部材の扱いが内製化と外注化に分かれる傾向がみられた。また，小規模な採用例もみられた。　3章では，プレカットエ場について調査し，その業態から，4つのタイプ（I.大手下請型，II.地域ビルダー型，III.材木店型，IV.工務店型）に類型化し，その特徴について普遍化させた。4章では，プレカット工場とその前後工程－構造・生産設計，木材の流通・管理，墨付け・加工工程，出荷・現場建方－の各段階について，工場I～IV類型ごとに生産管理の状況と工程・組織上の分担関係，情報伝達などに関連する技術要素について現状分析を行った。　全般的には，I・IIの生産規模が大きなラインでは，工程が細分化されるに従って，品質管理をはじめとする管理技術が浸透する方向にあり，ロットとのバランスを見出しつつ，企業努力によって安定化の方向にあるとの印象をうけた。一方，IVを中心とするタイプでは，生産効率という側面だけではなく，生産システム統合化のための有カな支援手段としての期待も大きいが，それを裏付ける資料の提示は，今回の調査では十分とはいえない。今後の重点的な研究課題として継続発展させたい。

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