Abstract-There are several automated random strategies of software testing based on the presence of point, block and strip failure domains inside the whole input domain. As yet no particular, fully automated test strategy has been developed for the discovery and evaluation of the failure domains. We therefore have developed Automated Discovery of Failure Domain (ADFD), a new random test strategy that finds the failures and their domains in a given system under test. It further provides visualization of the identified pass and fail domains. In this paper we describe ADFD strategy, its implementation in York Extensible Testing Infrastructure (YETI) and illustrate its working with the help of an example. We report on experiments in which we tested error-seeded one and two-dimensional numerical programs. Our experimental results show that for each program, ADFD strategy successfully performs identification of failures, failure domains and their representation on graphical chart.