Mathematical Model for Ergonomic Job Rotation Scheduling to Balance the Workload of Employees in Assembly Lines
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Assembly lines generally consist of a large number of repetitive manual tasks. Workers, performing these routines, are exposed to the risk of musculoskeletal disorders due to biomechanical overload on the limbs caused by repetitive manual tasks and longtime movements throughout the workday. Besides, a high production rate, one of the main objectives of assembly lines in mass production, leads to an increase of the physical workload of operators. For this reason, it is important to balance the workload between the operators in the assembly lines. In this study, the ergonomic risk assessment method, which is defined as an efficient evaluation tool of risks inherited by operators’ posture positions, is used. Then, with the use of this method, a job rotation scheduling model, which is taking into account the capabilities of operators, is developed. The developed mathematical model is applied in an automotive company and the results are obtained.
KeywordsJob rotation Assembly line Workload balancing
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