SCHEDULING THREE-STAGE HYBRID FLOWSHOP BY CONSIDERING LEAD TIME OF SPARE PARTS ORDERING, FIXED TECHNICIAN AND DEDICATED MACHINE TO MINIMIZE MAKESPAN

• Main Author: Windhi P, Oktifian
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/44081
• Institution: Institut Teknologi Bandung

Flowshop scheduling is a setting when a job has to go through several stages of the process in sequence. This study discusses the scheduling of three-phase hybrid flowshop by considering the lead time for ordering spare parts, the use of special machines (dedicated machines) and fixed technicians. The purpose of this study is to produce a solution in determining the allocation of jobs to fixed technicians and dedicated machines, as well as the order in which jobs occur in aircraft component maintenance workshops. The processor which is generally a machine, in the case of the three-stage hybrid flowshop is a human as a technician who processes the work. In stage three, the scheduling model must be able to accommodate the elements of fixed technicians and dedicated machines simultaneously. The optimal solution method proposed to produce the schedule was designed with the help of CPLEX software. The resulting optimal solution is able to solve small data computing in several scenarios. The heuristic solution method is also proposed to be able to produce a schedule using manual calculation steps. The proposed heuristic solution is able to accommodate the problems of fixed technicians and dedicated machines. The results of the analysis showed that the performance of the optimal model makespan and heuristics had an average deviation of 4.03%.