Defects and Failures of Testing

We will now discuss in this section about the Defects and Failures of Testing. Remember, not all coding errors results in software defects. That is to say, one common source of expensive defects is the result of requirements gaps. A common source of requirements gaps is non-functional requirements such as testability, scalability, maintainability, usability, performance, and security.

Testing is the process of identifying defects, where a defect is any variance between actual and suppose results. “A mistake in coding is called Error. Moreover, the defect consider by development team is a Bug, build does not meet the requirements then it Is Failure.

Therefore, to software faults occur through the following processes:

• Firstly, a programmer makes an error (mistake), which results in a defect (fault, bug) in the software source code.
• Secondly, if this defect enacts, in certain situations the system will produce wrong results, causing a failure.

For instance, defects in dead code will never result in failures. However, a defect can turn into a failure and may result in failure  when the environment changes.

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