Data and code for: A Scale-Robustness Diagnostic for Fuzzy Pairwise Comparison Matrices in the Analytic Hierarchy Process

Data and R code accompanying the manuscript "A Scale-Robustness Diagnostic for Fuzzy Pairwise Comparison Matrices in the Analytic Hierarchy Process: An Investment-Selection Illustration." This deposit contains: (1) FAHP_scales_analysis_verified.R, a self-contained base-R script that reproduces every quantitative result reported in the manuscript, including the fuzzification, Chang's extent analysis, the Buckley geometric-mean robustness check, the degree-of-fuzziness sweep, and the δ* normalisation, across all eleven comparison scales; and (2) delta_sweep_full11.csv, the degree-of-fuzziness sweep (δ = 0.05 to 2.00) for all eleven scales, underlying Figure 1 and Table 7 of the manuscript.