A Neuro-Fuzzy Performance Evaluation Model (NFPEM) proposed in Akinnuwesi, Uzoka, Olabiyisi, and
Omidiora (2012) was reviewed in this work with the view of modifying it and thus making it flexible
and scalable. The neuro-fuzzy expert system (NFES) reported in this paper is an enhancement to NFPEM
with expert system components. NFES can be used to evaluate the performance of Distributed Software
System Architecture (DSSA) with user-centric variables as parameters for performance measurement.
The algorithm developed for NFES was implemented using Coldfusion programming language and MySQL
relational database management system. The prototype of NFES was simulated using some life data and
the performance results obtained point to the DSSA responsiveness to the users’ requirements that are
defined at the requirements definition phase of the software development process. Thus the performance
value is a qualitative value representing DSSA (i.e. system) responsiveness.