Memoirs of the Faculty of Engineering, Okayama University volume41 issue1
2007-01 発行
Various kind of productions are made in semiconductor factories, where it employs the production system with
multiprocess and multiple Automated Guided Vehicles(AGVs) for transportation. It is difficult to optimize
planning of production and transportation simultaneously because of the complicated flow of semifinished products.
This paper describes the formulations of production scheduling and transportation routing, and algorithm
for simultaneous optimization of plannings by using logic cuts. The entire problem is decomposed to the master
problem and the sub problem. If it derives the infeasible solutions, new constraints are added to the master
problem to eliminate the solution area including infeasible solutions. The results of about optimality and computation
time by using CPLEX solver are shown compared with conventional decomposition method to check
up effectivity of proposed method in small size problem, and about optimality and computaion time for large
scale problem.