2 Team-Based DevelopmentOvercoming ChallengesMainaga: This was done to support a long service life in harsh locations characterized by exposure to severe vibration, such as bridges and expressways. There has been a need to extend the service life of the base section, which is prone to deterioration due to repeated loads from vibration following installation.When evaluating pole strength, we utilize an index known as the “fatigue rating.”The most commonly used fatigue rating is Grade C, which can withstand 2 million repeated loads at a stress of 125 MPa. Initially, we aimed for the next higher grade, Grade B (2 million loads at 155 MPa), but as we continued our analysis and testing, we began to feel confident that we could achieve even higher performance.As a result, we were able to achieve a Grade A rating (2 million loads at 190 MPa), creating a base with a long service life thanks to its unprecedented level of fatigue strength.Kido: Notably, this lighting luminaire boasts some of the most energy-efficient performance in the street lighting industry, and its base achieves Grade A fatigue strength. It must have been quite a challenge to achieve these targets.Mainaga: We conducted computer-based structural analyses, created test specimens based on the results, and verified them using fatigue testing equipment. We considered the results and undertook repeated improvements and experiments countless times. What we came to firmly believe through these experiments was that, in many cases, one won’t know what will work until the experiments are actually undertaken.On the one hand, ideas we were confident in didn’t produce the expected results, while on the other hand, methods we tried with some skepticism turned out to deliver better results than anticipated. I believe that these experiences greatly broadened the perspective of the entire internal differences of opinion arose during the project. However, by enthusiastically from constructive discussions to resolve the issue, we were ultimately able to achieve a clear result in terms of greatly improved performance.Looking back now, I believe that those discussions themselves were indispensable to achieving these outstanding results. team. Furthermore, incorporating useful Tagami: Becoming the first to achieve something that other companies are reluctant to take on is a strength that only Inaba can demonstrate. We hope to continue as an entity that supports society by addressing such challenges head-on.In this case, we developed the pole and lighting luminaire as a set, undertook a sweeping revision of the base structure, and even adopted a separate structure that facilitates maintenance of the lighting luminaire. These were initiatives that could be undertaken only by our company capable of manufacturing both the lighting luminaire and the pole.in several instances, ideas that emerged While development took three years, we believe we have devised the exact product we wanted to introduce to the world. Going forward, we intend to continue offering products and services that contribute to society through the sum of our collective strengths.Kido: What has been the reaction from those around you since the release of this product?Tagami: It is clear that the relevant government ministries and agencies have given this product high praise for its contribution to reducing both electricity bills and CO2 emissions.Mainaga: We acknowledge that new expectations have arisen for even lighter and more compact lighting luminaires as additional line. We take these comments as features representing clear opportunities that stake out our next challenge. We aim to add further value by incorporating additional improvements from a technical perspective.for this product Kido: Lastly, please tell us what you learned and what insights you gained from this development effort.Mainaga: Through this project, I came to the powerful realization that taking action without getting bogged down in assumptions is paramount. We encountered many challenges that could not be solved with prior assumptions or other precedents alone. We came to realize that, in many cases, the critical issues become apparent only through actual experimentation.Even failures and experiences that at first glance appear to have been detours can become valuable future improvements and innovative ideas. I have once again come to understand the importance of remaining flexible and moving forward while repeating cycles of hypotheses and verification.Tagami: Because many team members were involved in this project, a great variety of opinions and ideas were generated, so I feel that we were able to create an even better product than before because of this wide-ranging input.Previously, the person in charge would have been the only one working on the project, and there was a strong sense that that one individual owned a particular project. However, we realized that having many team members involved expanded the scope of ideas generated, leading to a better outcome. Looking ahead, we would like to work together as a team and proceed with development with an emphasis on agility.lessons lead that to Verification using simulation analysisVerification using actual modelsModerator: Taro Kido, New Development Group
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