Ergonomic design of a collaborative workstation: laboratory experiments and new optimization model

This thesis develops a mathematical model for the layout design of a collaborative workstation involved in the production of non-bulky objects. The primary objective is to determine the optimal positioning with respect to the operator of the cobot, tools, and necessary component required for the task by taking into account operator ergonomics, task-related fatigue and execution time. To overcome these challenges, a thorough analysis of the different operations performed during a workday has been conducted. The operations have been decomposed and categorized using the Maynard Operation Sequence Technique (MOST) method, which allows for a detailed breakdown of activities into discrete and individual actions. This process of granular decomposition of operations has enabled the analysis and evaluation of each individual action separately, providing a solid foundation for making decisions on the positioning of cobots and various elements within the workstation. The assessment of the ergonomic aspects of individual activities was conducted through the utilization of the REBA method which was employed to evaluate the overall body postures of the operator, providing a comprehensive understanding of the ergonomic implications associated with each activity. Through the analysis of these operations and the application of the developed mathematical model, the objective is to offer a systematic and structured framework for the design of the workstation layout.