Optimal Lot-Sizing Decisions in Production Systems Using the Wagner-Whitin Algorithm for Data-Driven Inventory Control

Bela Pitria Hakim (1), Muhammad Nashir Ardiansyah (2)
(1) Faculty of Industrial Engineering, Telkom University, Jl. Telekomunikasi.1 Dayeuhkolot, Bandung, Indonesia
(2) Faculty of Industrial Engineering, Telkom University, Jl. Telekomunikasi.1 Dayeuhkolot, Bandung, Indonesia
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B. P. Hakim and M. N. Ardiansyah, “Optimal Lot-Sizing Decisions in Production Systems Using the Wagner-Whitin Algorithm for Data-Driven Inventory Control”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 15, no. 3, pp. 848–856, Jun. 2025.
The intersection of automation, visualization, and lot sizing, particularly through the Wagner-Whitin algorithm, plays a crucial role in optimizing production processes and improving decision-making efficiency. Determining optimal lot sizes in multi-period production systems is complex due to fluctuating demand, setup costs, holding costs, and capacity constraints. Effective solutions must dynamically address these variables to ensure optimal resource utilization and minimize waste. This study aims to develop an automated calculator that streamlines lot-sizing computations by integrating advanced mathematical models, such as the Wagner-Whitin algorithm, and innovative data visualization techniques. To design and evaluate this calculator, the study compares its effectiveness with traditional methods, such as lot-for-lot, with a focus on enhanced usability and user satisfaction. The study uses historical production data, including demand forecasts, setup costs, holding costs, and capacity constraints, to validate the model. The tool integrates the Wagner-Whitin algorithm for optimal lot sizing and incorporates sensitivity analysis to assess various scenarios. A comparative analysis is performed, testing the automated calculator against conventional methods. Performance metrics, including accuracy, calculation speed, scalability, and error reduction, are evaluated in simulated multi-period production environments. The results demonstrate that the automated calculator significantly improves calculation accuracy, decision-making, and error reduction compared to traditional methods. This research highlights the transformative potential of automated solutions in enhancing manufacturing operations. Future studies could expand the tool to address complex constraints, such as supply chain disruptions and multi-echelon inventory systems, and incorporate machine learning for improved demand forecasting accuracy and adaptability.

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