The research analyzes the particularities of the Mexican maquiladora industry in the Just in Time (JIT) implementation process as a global example of maquiladoras, analyzing 31 competitive advantages or benefits obtained after a JIT implementation process, which were integrated into four dimensions: Human Resources , Production Process , Inventory Management , and Economic Performance of companies. The study proposes a structural equation model which assumes that human factor is the most important benefit obtained after JIT implementation and is proposed as the initial or independent latent variable, being the final latent variable or last benefits the company’s Economic Performance . The final results in the model show how the capabilities and skills in Human Resources affect 86 % of the variance of the Production Process , which together explains the 82 % of Inventory Management . Finally, Human Resources , Production Process , and Inventory Management explain 79 % of Economic Performance obtained from JIT.