Keywords: project management, control table, diagram.

In this paper, we present our kaizen to accelerate the design procedure and improve the quality of the upstream design by changing the workflow of the projects. First, we established a new unit dedicating to drawing control diagrams and tables. Our workflow had a time gap between finalizing the design condition and the onset of finalizing the system's specifications by drawing control diagrams and tables. We filled this gap by parallelizing the preliminary design and drawing control diagrams and tables. Also, this parallelization contributes to improving the quality of the upstream design by uncovering problems in design because drawing diagrams require detailed considerations. Second, we set a technical committee to identify the issues during the upstream stages of the design. This new committee helps us further uncover problems by asking all related departments' opinions. Third, point cloud data is used to accelerate the design by reducing the frequency of visiting the site. As a result, we accelerated our procedure by several months while improving the quality of the upstream design.

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