Soil classification framework integrating granulometric analysis, AASHTO and SUCS systems for standardized geotechnical assessment. The diagram flows from foundational concepts through laboratory testing procedures, particle-size criteria, and two major classification methodologies used globally. Engineers use this hierarchical approach to predict soil behavior under traffic loads, select appropriate construction materials, and ensure structural stability. Fork and customize this concept map on Diagrams.so to adapt soil classification workflows for your regional standards or project-specific requirements.