The main motivation behind the improvement of manufacturing systems is that they are competing for a larger share and better image in the market. Many manufacturing systems, particularly those with repetitive products, utilize assembly lines for the final stage of their production systems. Most of the assembly lines still rely on human worker performance since higher flexibility can be attained with manual systems. The performance of manual assembly line systems depends on how ergonomic factors are involved with balancing the lines. Therefore, the main focus of this study is to develop a model to design assembly lines with ergonomic risk consideration. Ergonomic risks are the factors of weight, size, and shape of the components in addition to the posture of the workers performing the tasks with the components. This study also conducts ergonomic risk analysis for assembly tasks using simulation software and incorporates the results into the developed model. There are two conflicting objectives in the problem, thus the required solution model is constructed as multi-objective. Since the objectives of the problem have vagueness, the proposed model is developed adopting fuzzy set theory. The developed fuzzy multi-objective model is implemented in a real-life case problem gathered from a refrigerator company.

制造系统改进背后的主要动机是它们在市场上争夺更大的份额和更好的形象。许多制造系统，尤其是那些具有重复产品的制造系统，在其生产系统的最后阶段使用装配线。大多数装配线仍然依赖于人类工人的表现，因为手动系统可以获得更高的灵活性。手动装配线系统的性能取决于人体工程学因素如何与平衡线相关。因此，本研究的主要重点是开发一个模型来设计符合人体工程学风险的装配线。除了使用组件执行任务的工人的姿势之外，人体工程学风险还包括组件的重量、尺寸和形状等因素。该研究还使用仿真软件对装配任务进行了人体工程学风险分析，并将结果整合到开发的模型中。问题中有两个相互冲突的目标，因此所需的解决方案模型被构建为多目标。由于问题的目标具有模糊性，所提出的模型是采用模糊集理论开发的。开发的模糊多目标模型在从一家冰箱公司收集的实际案例问题中实施。