In this study, a heuristic model for robotics integrated production (RIP) is developed for determining economic production quantity (EPQ) based on triple risk-return characteristics of maintenance, safety, and training. Total risk-return index (TRRI) is then proposed to compare the optimal production quantity of a traditional MCM with robotics integrated counterpart. TRRI is introduced as an index independent of the production parameters that is theoretically based on two sub-functions known as the ideal risk function (IRiF) and ideal return function (IReF). EPQ is then determined by simply calculating the absolute value of the difference between these two sub-functions. The findings of a real case study in plastic injection molding industry reveal that, depending on the mass production volume and product cycle times, production mode should be switched between the traditional MCM (T-MCM) and robotics integrated system to optimize the risk-return characteristics of the ideal function. Robotics integrated production model is also proved to be a more economical and reliable alternative to the T-MCM for all product categories in this study except for those with a weekly production volume of less than 8 K units and a respective cycle time of more than 75 s as compared to the other two product families.
Order Quantity Mass Customization Reconfigurable Manufacture System Plastic Injection Molding Economic Production Quantity
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