Production Planning for Parallel Machine Working System using Makespan Determination

This work developed the method used to plan the production for parallel machines, aiming to achieve the maximum working efficiency condition. There are two types of machines, regular and special. The same type of machine might work independently and/or dependently depending on the processes required but for the different type, machine will work dependently. The model based on the determination of machine makespan was applied in order to assign the works providing the maximum daily working time or the minimum idle time of each machine. The constrained conditions were determined, based on the nature of the production of interest. The developed method could establish the efficient plan according to the former study and provide the working efficiency being higher than 90%, comparing to original plan having efficiency only 60-70%.