| Summary: | Approved for public release; distribution is unlimited === The National Aeronautic and Space Administration (NASA) and its prime
contractors currently use a software tool called RMAT (the Reliability and
Maintainability Assessment Tool) for the forecasting of Orbital Replacement Unit
(ORU) failure rates and associated maintenance demands for the International
Space Station (ISS). This thesis introduces a new model: CMAM (the
Comparative Maintenance Analysis Tool), which was developed to replicate
some of the basic functionality of RMAT in order to provide a comparative look at
RMAT results. The CMAM program, developed in Visual Basic.net and
dynamically linked to a Microsoft ACCESS database, focuses on a
representative set of critical Orbital Replacement Units (ORUs that represent key
items that require both internal and external maintenance in both pressurized and
un-pressurized storage) and generated failure rate data for each critical ORU.
The results of the CMAM model are then compared with the failure rates
generated by RMAT program for the same set of critical ORUs. These two
independently developed sets of data are then analyzed against historic failure
rates for these ISS parts. === Major, United States Army
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