Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) H. Ikeda and H. Takahashi and K. Ishihara and N. Komoda and S. Honda and Yoshitomo Ikkai,A rapid planning method of practicable solution with conversational function of constraints relaxation for a process ordering problem using spare jobs,ETFA 2001. 8th International Conference on Emerging Technologies and Factory Automation. Proceedings (Cat. No.01TH8597),,IEEE,2002-11-14,2,,337-342,https://cir.nii.ac.jp/crid/1872835443043293312,https://doi.org/10.1109/etfa.2001.997704