This case study introduces a usability testing technique to assess a self- developed project management software with inexperienced users. This report aims to describe this new technique used in an internal auditing environment and its result in gaining information of efficiency and effectiveness risks as well as user satisfaction The study results show how satisfied a staff is with his/her overall experience with the software. Implications are included that should help the organization enhance staff satisfaction and staff resistance. As this technique does not require high computer expertise but provides a quick and inexpensive way to gather useful direct information about software risks, staff perceptions, problems and audit recommendations toward using the studied software; it is appropriate to use as an additional Computer Assisted Audit Technique.