03946nas|a2200433 i 4500 20260818175258.0 121095s1984 th uu m rtt 00| a1eng d .b10038796 AIT RSPR no. IE-84-18 Thawat Treewannakul A quantitative approach to scrap reduction planning in an aluminum factory Bangkok : Asian Institute of Technology, 1984 104 p. Research studies project report ; no. IE-84-18 A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1984 The search for a minimum sum of scrap production is the core requirement in any aluminum section manufacturing. this study develops a method for scrap reduction planning in an aluminum extruding factory which produces aluminum sections from aluminum billet. There are 81 different cross sections of aluminum sections under consideration. The main problems are what different billet sizes are used in producing those 81 cross sections of aluminum sections and what subset of billet sizes is selected to stock to supply total demand with the result of total minimum sum of scrap production in the factory. In developing the method, three successive stages of solution procedure are made, namely: (1) determine all feasible billet sizes that can be used to produce each of 81 cross sections of aluminum sections, (2) determine an optimum set of billet sizes used to produce those 81 cross sections; i.e. the set that gives minimum sum of scrap in extruding process, and (3) select a subset of billet sizes from the optimum set to stock; i.e. the set that gives a minimum sum of increased scrap production apart from the sum in extruding process. A computer program is employed for stage 1, zero-one integer linear programming is used for stage 2, and finally a dynamic programming is developed for stage 3, Results of the developed method indicate the list of optimum 81 billet sizes for those 81 cross sections of aluminum sections and the list of billet sizes, with different numbers of stocked sizes, selected to stock. They also indicate the number of each size needed to stock and the total sum of scrap produced in the factory. The study provides the analysis when the forecasted demand changes and the number of stocked sizes is varied. Aluminum industry and trade Tabucanon, Mario T., Chairperson Fujiwara, Okitsugu, Examinaton Committee Clarke Harry R., Examination Committee Government of Belgium Government of Australia, Scholarship Donor Asian Institute of Technology. Research studies project report ; no. IE-84-18 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B20752 .b10038796 mnait y 240619 3 951012 m a y 2 mnait mnait mnarc mnarc 20 40 Barcode : 30050003110177 CREATED : 1995-10-13 RECORD # : i10025170 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003110151 CREATED : 1995-10-13 RECORD # : i10025182 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003110169 CREATED : 1995-10-13 RECORD # : i10025194 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160109939 CREATED : 2016-08-04 RECORD # : i12931913 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 96691 96691 0 0 0 0 MAIN MAIN mnait 2026-08-18 10.00 0 AIT RSPR no. IE-84-18 30050003110177 2026-08-18 17:52:58 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 10.00 0 AIT RSPR no. IE-84-18 30050003110151 2026-08-18 17:52:58 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 10.00 0 AIT RSPR no. IE-84-18 30050003110169 2026-08-18 17:52:58 3 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT RSPR no. IE-84-18 30050160109939 2026-08-18 17:52:58 1 2026-08-18 40