A Preliminary Descriptive Reference Scale for Balance Gap: BG-10 Exploratory Coding Layer v0.4

This public concept note explores BG-10 as a preliminary descriptive reference scale for discussing Balance Gap (BG) within visible-body proportion observation. Existing systems such as Body Mass Index (BMI) and Bioelectrical Impedance Analysis (BIA) remain valuable for evaluating body mass and internal composition variables. However, these systems were not originally designed to describe upper-lower proportional discrepancy, silhouette transition relationships, structural balance, or longitudinal visible-body organization. Within the broader exploratory framework of visible-body proportion interpretation, Balance Gap (BG) conceptually describes the absolute discrepancy between upper-body spread and lower-body spread relative to the waist transition. This note introduces BG-10 as a simplified descriptive coding layer that translates raw BG values into 1–10 observational coding levels for methodological discussion and longitudinal tracking purposes. Lower coding levels indicate smaller proportional discrepancy, while higher coding levels indicate broader relational divergence requiring wider contextual review. The BG-10 structure presented here is exploratory only. It is not a diagnostic tool, medical assessment system, beauty ranking system, or replacement for established physiological or anthropometric evaluation methods. Specific calibration systems, computational weighting structures, adaptive interpretation rules, implementation protocols, and protected interpretation-engine details are intentionally not disclosed in this note. This archive is intended solely for exploratory scholarly discussion, conceptual refinement, methodological comparison, and future interdisciplinary development. Version:v0.4 — Public Concept Note Open for community feedback and interdisciplinary refinement.