SNowadays, electronic devices are the major part of many applications starting from automotive market to military equipment, from personal computers and cellphones to satellites and spacecrafts. Each application has its own requirements and specification to be fulfilled by the designers. Some of these applications known as mission critical application are involved in a huge amount of money and resources that could be lost if something goes wrong. Therefore, electronic devices used in the mission critical application require special attention in terms of dependability to guarantee that they can tolerate faults induced by environment that could lead to the failure of the entire system.