Testing ,Metrics

Testing Reliability metrics uses two approaches to evaluate the reliability.

First, it ensures that the system is fully equipped with the functions that are specified in the requirements. Because of this, the errors due to the lack of functionality decreases .

Second approach is nothing but evaluating the code , finding the errors and fixing them.

The current practices of software reliability measurement can be divided into four categories.

1) Product metrics

2) project management busy

3) process metrics

4) Fault and failure metrics

As discussed  earlier software size and complexity plays an important role in design and coding phase. One of the product metrics called function point metric is used to estimate the size and complexity of the program.

Project Management metrics increases reliability by evaluating the Management process whereas process metrics can be used to estimate , monitor and improve the reliability and quality of the software.

The final one, Fault and Failure Metrics determines, when the software is performing the whole functions that are specified by the requirement documents with out any errors. It takes the faults and failures that arises in the coding  and analyzes them to achieve this task.