Aerospace Manufacturing-Remanufacturing System Modeling and Optimization

摘要: In recent years, increasing environmental concerns, costs of raw materials, and stricter government regulations have resulted in companies striving to reduce their waste materials. An earlier approach adopted was the recycling materials such as paper, glass metals. However, recycled products typically lose a portion added values. Different reduction options direct reuse, repair, refurbishing, cannibalization, remanufacturing were studied overcome this drawback. Remanufacture recaptures value when product first manufactured. In aerospace industry, where safety performance are overriding concerns repairs highly regulated, it could be perceived that has minimal appeal. very low design tolerance manufactured components results high percentage defects. Due price saving through “transforming” applied imperfect production systems amount scrap thesis, general model is proposed for closed-loop supply chain network which includes following processes: repairs, transforming selected defective end-of-life products, cannibalization. A mixed integer linear programming formulation developed investigate effect various factors on profit, inventory carrying cost, number components. Uncertainty demand lead-time one major issues any manufacturing chain. Uncertainty incorporated into an extended scenario-analysis outsourcing considered option customer owned Demand final assumed deterministic. The defect rate disassembled components, however, variable makes spares variable. in-house also Sensitivity analysis performed capacity, lead-time, variation profit scraps. cost variations turnover ratio. maximum capacity outsourced company process per unit significant profitability. Maintaining long-term relationship with third-party service providers, designing longer life cycle, directly impact profitability over cycle product.