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<p>Human Systems Integration (HSI) is a process designed to reduce life-cycle costs and improve system performance by considering human-related  domains. Acquisition specialists lack objective, quantitative research findings on  which to base trade-off analyses. This thesis used eight fiscal years of historical  safety (mishaps), manpower (manning levels) and system performance (SORTS)  data on the U.S. Navy's Frigates, collected from computer databases of routine  reports, to explore relationships in an existing notional model of HSI. Three  hypotheses were tested: there is a negative relationship between manning and  SORTS levels; there is a negative relationship between manning and mishaps;  and there is a positive relationship between mishaps and SORTS levels. No  significant relationships were found between SORTS levels and manning or  mishaps. When all of the ships were ranked for each month based on percent of  total manning and number of reportable mishaps, a positive correlation  (Spearman's rho = 0.4194, p-value = 0.0294) was found corresponding to a  negative relationship between manning levels and mishap rates. More detailed  research is needed to isolate the relationship between manning levels and  mishap rates from numerous other influences and any noise that may be present  in the data set.
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<br>Subjects: Frigates; United States</div>
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Lazzaretti, Patrick C.</div>
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