For complex models of logistics strategies, as described earlier in this paper, SEM is not
only the ideal analytical technique but perhaps the only technique that can provide a
sound theoretical basic for analysis. To confirm the underlying structure, the authors
conducted CFA on the 1999 data using AMOS. A number of fit indices such as x 2, root
mean square error of approximation (RMSEA) goodness of fit index (GFI), and
comparative fit index (CFI) are used to assess the model fit of the hypothesized structure.