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The MATLAB file epa_overall.m computes the EPA ratio for the 1 Spool Turbojet Engine model using the subcomponent models and using quasi Monte Carlo method. The output values for the subcomponents are stored in 
epa_diffuser 
epa_hpc 
epa_burner 
epa_hpt 
epa_nozzle

The EPA value for the over engine model is stored in 
epa_overall_subsys
The EPA value for the corresponding ideal propagator system is stored in
epa_propagator
and the EPA value computed using qMC is stored in
epa_overall_MC 

As one can see, the approximate EPA value computed using subcomponent is 0.8729 and the EPA value using qMC is 0.7662. The EPA computation using subcomponent takes about 30 seconds where as the EPA computation using qMC takes about 3000 seconds for 1000 samples. The qMC results are precomputed and stored in epa_overall_data.mat MATLAB structure file.  

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