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Table 11 Unrotated factor loadings and communalities – Optimized network
From: Performance assessment of alternative SSS networks by combining KPIs and factor-cluster analysis
Variable | Factor 1 | Factor 2 | Factor 3 | Factor 4 | Factor 5 | Factor 6 | Factor 7 | Factor 8 | Communality |
|---|---|---|---|---|---|---|---|---|---|
WD - Weekly Demand | −0.620 | − 0.483 | − 0.176 | 0.424 | − 0.389 | − 0.140 | 0.011 | − 0.000 | 1.000 |
WF - Weekly Frequency | − 0.906 | − 0.137 | − 0.305 | − 0.067 | 0.143 | 0.041 | −0.203 | 0.003 | 1.000 |
NS - N. of intermediate Stops | 0.550 | −0.635 | −0.301 | 0.284 | 0.207 | 0.282 | 0.033 | 0.005 | 1.000 |
SD - Sailing Distance | 0.450 | −0.770 | −0.042 | − 0.352 | 0.034 | − 0.279 | 0.004 | 0.006 | 1.000 |
RWT – Ratio WT/TT | 0.833 | 0.343 | 0.325 | 0.165 | −0.211 | − 0.006 | −0.104 | 0.012 | 1.000 |
OC - Operating Cost | 0.427 | 0.459 | −0.637 | 0.269 | 0.238 | −0.270 | 0.002 | −0.000 | 1.000 |
TC - Time Cost | 0.940 | −0.294 | 0.091 | 0.067 | −0.046 | −0.009 | − 0.121 | −0.014 | 1.000 |
UE – Unitary Emission of CO2 | 0.365 | 0.182 | −0.781 | −0.303 | − 0.337 | 0.139 | 0.005 | −0.000 | 1.000 |
Eigenvalue | 3.6042 | 1.6961 | 1.3441 | 0.5838 | 0.4324 | 0.2711 | 0.0679 | 0.0004 | 8.000 |
% Var | 0.451 | 0.212 | 0.168 | 0.073 | 0.054 | 0.034 | 0.008 | 0.000 | 1.000 |