An Analysis Method with Failure Scenario Matrix for Specifying Unexpected Obstacles in Embedded Systems

This paper describes an analysis method with failure scenario matrix for specifying unexpected obstacles in or-der to improve the quality of embedded systems. Although embedded software has become increasingly large in scale and complexity, companies are requiring the software to be developed within shorter periods of time. Therefore, the quality of the software is bound to suffer. This problem is one of the most serious concerns in a coming age of ubiqui-tous embedded systems. In order to improve the quality, it is very important to specify the forbidden behavior of embed-ded systems. The forbidden behavior of unexpected obsta-cles is analyzed by using a matrix and scenarios. This pa-per provides a detailed description of the analysis method used, in particular the cause, phenomenon, and goal in the scenario, relating them to each other by using a matrix. 1