Software fault tolerance is the ability of computer software to continue its normal operation despite the presence of system or hardware faults.
Introduction
The only thing constant is change. This is certainly more true of software systems than almost any phenomenon, not all software change in the same way so software fault tolerance methods are designed to overcome execution errors by modifying variable values to create an acceptable program state. The need to control software fault is one of the most rising challenges facing software industries today. It is obvious that fault tolerance must be a key consideration in the early stage of software development.
There exist different mechanisms for software fault tolerance, among which:
References
Software fault tolerance Wikipedia(Text) CC BY-SA