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Clearing function-based release date optimization in a multi-item multi-stage MRP planned production system in a rolling-horizon planning environment with multilevel BOM

This study explores the integration of clearing function (CF)-based release planning into Material Requirements Planning (MRP) systems, with a focus on mitigating the inherent rigidity of MRP in handling variability in production environments. By replacing the backward scheduling step of MRP with a CF-based optimization model, this work investigates its impact on overall costs, lead times, and system performance in multi-item, multi-stage production systems. Computational experiments were conducted on two distinct systems - a simple and a complex production system - under varying demand behaviors and utilization levels. The findings reveal that the CF-based release order planning consistently outperforms traditional MRP in managing cost and variability, particularly under scenarios of higher demand uncertainty and shop load. While MRP demonstrates stability in less complex scenarios, its inability to adapt dynamically to variability leads to higher costs in most conditions. The analysis underscores the potential of CF-based methods to enhance planning efficiency in dynamic production settings, providing a foundation for future research on integrating capacity constraints within the broader MRP framework.

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