This white paper introduces the Smart Manufacturing Kaizen Level (SMKL) method developed by Mitsubishi Electric, a structured framework designed to help industrial manufacturing and infrastructure organizations assess their digital transformation needs and identify the most appropriate digital solutions. By evaluating two key dimensions — scope of work and digital maturity stage — the SMKL matrix guides organizations from basic data collection through visualization, analysis, and full process optimization. The guide walks through real-world customer examples and a transportation use case to demonstrate how the method is applied in practice. Organizations gain a clear baseline of where they currently stand, where they want to go, and what hardware and software solutions can bridge the gap. Ultimately, the SMKL method empowers businesses to pursue continuous improvement and operational excellence with confidence and clarity.