*3.4. Sensitivity Analysis Results of the Input Variables on the Developed Models*

The sensitivity analysis findings for both RSM and ANN are shown in Figure 6. The result for both models have the same pattern in that the most influential response input variable (bio-jet fuel yield) was seen to be microwave power, followed by reaction time and finally by ethanol to oil molar ratio. The degrees of significance distributions, however, differed between the methods of modeling. The significance level of 68.89% microwave power, 16.25% reaction time and 14.86% ethanol to the molar ratio for RSM. While for ANN, the important microwave power rating was 42.29%, the reaction time was 29.03% and the ethanol oil molar ratio was 28.68%.

**Figure 6.** Sensitivity analysis for bio-jet fuel production.
