Aircraft final assembly line scheduling with user preferences and equity of work distribution

We investigate the task scheduling problem within an aircraft Final Assembly Line aimed at enhancing the ergonomic conditions for operators. We propose two optimization models tailored for decision-makers to integrate ergonomic considerations into the scheduling process, with the overarching goal of improving operator working conditions. The first model employs the discrete version of the Choquet integral to depict user-preferred ergonomic task sequences. The second model utilizes a min-max criterion and Gini coefficient to assess the equity of task distribution among operators. Through a case study within the aeronautical industry, we analyze the effectiveness of these criteria in decision-making processes. The results obtained are thoroughly discussed, and avenues for future research are outlined.