Kata methodology offers a practical approach to achieving perfection in assembly lines. Traditional kata practice has certain limitations because of the time delays in data collection, analysis, and discovery of causes. We addressed issues using an Industrial Internet of Things (IIoT) solution at a factory that manufactures and assembles automobile Heating, Ventilation, and Air Conditioning (HVAC) systems.
In this case study, we comprehensively explore the synergistic potential of integrating the kata methodology and IIoT technology to boost assembly line productivity. The study presents the design principles governing the implementation of the kata methodology with IIoT and underscores the pivotal role of real-time data in this context. This work demonstrates a compelling benefit of the integrated IIoT-kata approach in a real-world setting. It further suggests the changes to the 4M factors (men, method, materials, machine), highlighting the significance of traceability in manufacturing and the positive impact on Overall Equipment Effectiveness (OEE). The paper presents the task scorecards and dashboards for real-time monitoring and decision-making. The results encompass quantitative and qualitative outcomes, spotlighting the enhanced productivity and efficiency achieved through the IIoT-kata implementation.

Keywords: Toyota Kata, Improvement Kata, Assembly line, Continuous improvement, IIoT, Industry 4.0