Quantitation of Factors Influencing Product Lead-time with a Cumulative Curve

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  • 流動数曲線を用いた製造リードタイムに影響を与える要因の定量化
  • リュウドウスウ キョクセン オ モチイタ セイゾウ リードタイム ニ エイキョウ オ アタエル ヨウイン ノ テイリョウカ

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Abstract

This paper focuses on the reduction of product lead-time. The reduction of product lead-time is one of the issues facing the manufacturing industry. Resolving this issue is achieved by operational and kaizen approaches. In the operational approach, operational procedures are improved without changing the system design parameters in order to increase system efficiency. In the kaizen approach, system design parameters are changed through improvement activities in order to increase system efficiency. It is important that both operational and kaizen approaches are alternately conducted. Although scheduling methods or planning methods have been extensively studied as operational approaches, the kaizen approach method has been studied less. In the kaizen approach, many improvement cases have been shown. One reason is the difficulty to grasp an appropriate perception of the actual manufacturing environments where many factors are complexly intertwined. This means that the manufacturing environments could not been identified as the kaizen problem. This paper proposes a method for quantification of the kaizen problem. The proposed method is comprised of three procedures (i.e., visualization, representation and quantification). Finally, the validity of the proposed method is demonstrated using the real data of a medium-sized manufacturer that uses both make-to-order and make-to-stock production.

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