Analysis of the Self-balancing Production Line with Walk-back Time

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  • 戻る時間を考慮した自己バランスラインの解析
  • モドル ジカン オ コウリョ シタ ジコ バランスライン ノ カイセキ

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In the traditional production lines designed using the line-balancing method, each worker is usually assigned to a particular fixed task, and it is valuable to decrease the training time required to master the assigned task. However, when an imbalance among workers' speed exists, the slowest worker will delay the overall work in the production line, and the production rate of the production line will also decrease. To resolve this problem, the "Self-balancing Production Line," where each worker is assigned to work dynamically, thus maintaining the balanced production, was introduced. In this type of production line, the condition of constant working velocity is assumed, and the walk-back time to takeover an item from an upstream worker is ignored under the above condition. However, the walk-back time cannot be ignored in real life. Considering the walk-back time, the condition of balanced production changes depending on the walk-back velocity. Therefore, it is necessary to consider the walk-back time to find the maximum production rate, and thus keep the balance. In this paper, the production policies for a production line with walk-back time are proposed, and the conditions for self-balancing are found and analysed. Moreover, conditions leading to imbalance and the effects of initial conditions are also derived.

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