Accession Number : ADA591338


Title :   Identifying Trustworthiness Deficit in Legacy Systems Using the NFR Approach


Descriptive Note : Journal article


Corporate Author : TEXAS UNIV AT TYLER


Personal Author(s) : Subramanian, Nary ; Drager, Steven ; McKeever, William


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a591338.pdf


Report Date : Jan 2014


Pagination or Media Count : 9


Abstract : Trustworthiness is an important emerging requirement for software systems deployed by the U.S. Air Force. Trustworthiness, briefly stated, is the ability of a software system to be safe, secure, and reliable within a normal operating environment. However, most software systems have not been developed with trustworthiness in mind. Therefore, how do we systematically identify deficits in trustworthiness in existing systems so that they may be re-engineered with trustworthiness as a priority? The Non-Functional Requirements (NFR) Approach provides a framework for identifying gaps in trustworthiness in existing systems, and recommending mechanisms to overcome this shortfall in trustworthiness in re-engineered systems. In this project, we applied the NFR Approach to the Air Force's Phoenix middleware system and determined that it has an 89% shortfall in trustworthiness. The advantages of identifying this deficit include determination of trustworthiness in current systems, exploring environments in which current systems may be used or reused, and prioritizing trustworthiness requirements when these legacy systems are re-engineered.


Descriptors :   *ADAPTATION , *COMPUTER PROGRAM RELIABILITY , *DEFICIENCIES , *MIDDLEWARE , *MODIFICATION , *SOFTWARE ENGINEERING , AIR FORCE , DECOMPOSITION , GRAPHS , INTEROPERABILITY , MAINTAINABILITY , REPRINTS , REQUIREMENTS , SECURITY , TIMELINESS


Subject Categories : Computer Programming and Software
      Military Forces and Organizations


Distribution Statement : APPROVED FOR PUBLIC RELEASE