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Reliability testing

Reliability characteristic of a software is defined as a failure free software for operations for a period of time in a particular environment. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives a stable outcome or results for the steps performed consistently. 

Now a days, since the dependency of software is high, people blindly believe the in the software and will trust on its result whatever it may be, users believe that the data shown is correct and always the software operates correctly. The software applications are used everywhere nowadays almost all fields like healthcare, government sectors and telecommunication. The purpose of reliability testing is to ensure that the software provides stable outcome and perfectly satisfies the requirements for which it is made and also rendering the fault-free operation.

Things that are influencing software reliability are:

  1. The number of bugs or mistakes present in the software.
  2. The user’s way of operating the system.

Reliability testing helps to identify many problems while designing the software and also verifies the functionality. It is one of the not functional quality characteristic of  software. The goal of reliability testing is to check whether the software meets the requirements of client’s reliability. There are various levels of performing this testing. Most complex system will be tested at unit, assembly and subsystem levels.

Factors to measure the reliability software:

  1. Test – retest reliability:

We will consider a situation in which we will be testing software functionality twice at 10.00 am and again at 12.00 pm later. When we compare the results, suppose if we get high correlation  in  results we can say that the software is reliable. Consider an example of a person attending an IQ test and scoring 150 points and after some months he takes again IQ tests and scores 60 points than he may be not considered as reliable. Reliability is a consistency of software to provide the stable outcome.

  1. Parallel form of reliability:

Here many testers, who will conduct tests in many forms at the same time. They verify results in parallel way.

  1. Inter-related reliability:

It is also called as inter-coder reliability. It is used for special purpose to check the reliability which consists the multiple raters or judges. For example suppose a contestant taking part in a halloween competition and getting marks as 9,8,9 from multiple judges. This score can be considered as reliable. But instead if he had scored 9,3,6 then it is not reliable. Similarly for the software, consistent quality rating are to be provided by all testers. 

Reliability and validity are the two important features that a any test scores can have, they are always mentioned together but often give two different kinds of information.

Reliability tells us  how consistently the test scores measure something whereas the validity tells us whether the test scores are measuring the right things for a particular use of test.

Consider an analogy which shows the difference:

By testing the measure of test taker’s proficiency in a particular set of knowledge or skills in a shooting target with each shot, which represents the administration of the test.

Reliability testing

A test can have a high reliability in one group of test takers than another group .But validity depends on how the scores are being used its reliability will not.

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  1. Reliability characteristic of a software is defined as a failure free software for operations for a period of time in a particular environment. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives a stable outcome or results for the steps performed consistently.
    Things that are influencing software reliability are:
    a. The number of bugs or mistakes present in the software.
    b. The user’s way of operating the system.
    Reliability testing helps to identify many problems while designing the software and also verifies the functionality. It is one of the not functional quality characteristic of software. The goal of reliability testing is to check whether the software meets the requirements of client’s reliability. There are various levels of performing this testing. Most complex system will be tested at unit, assembly and subsystem levels.
    Factors to measure the reliability software:
    1. Test – retest reliability
    2. Parallel form of reliability
    3. Inter-related reliability

  2. In this hi-tech world, everyday-everyone uses software applications in almost every single fields including healthcare, government sectors and telecommunication. Therefore it needs to be safe and reliable and for this Reliable testing is done to make sure that the software is reliable and satisfies the purpose of its development. Also it ensures that the software provides stable outcome and perfectly satisfies the requirements for which it is made and also rendering the fault-free operation.
    Reliability testing helps to identify many problems while designing the software and it checks whether the software meets the requirements of client’s reliability with various level of testings.
    Factors to measures in this software are as follows:
    1. Test – retest reliability
    2. Parallel form of reliability
    3. Inter-related reliability

  3. Reliability characteristic of a software is defined as a failure free software for operations for a period of time in a particular environment. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives a stable outcome or results for the steps performed consistently.
    Things that are influencing software reliability are:
    1. The number of bugs or mistakes present in the software.
    2. The user’s way of operating the system.
    3. Reliability and validity are the two important features that a any test scores can have, they are always mentioned together but often give two different kinds of information.
    Factors to measure the reliability software:
    1. Test – retest reliability
    2. Parallel form of reliability
    3. Inter-related reliability
    Reliability tells us how consistently the test scores measure something whereas the validity tells us whether the test scores are measuring the right things for a particular use of test.

  4. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development
    This reliability testing is ensure that the software provides stable outcome and perfectly satisfies the requirements for which it is made and also rendering the fault-free operation.
    The goal of reliability testing is to check whether the software meets the requirements of client’s reliability.

    Things which are influencing software reliability are:
    1.The number of bugs or mistakes present in the software.
    2.The user’s way of operating the system

    Factors to measure the reliability software are:
    1.Test – retest reliability
    2.Parallel form of reliability
    3.Inter-related reliability

  5. What is reliability characteristics of a software?
    It is a failure free software for operations for a period of time in a particular environment .
    Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives a stable outcome or results for the steps performed consistently.
    Factors influencing software reliability are
    1. Number of bugs and mistakes present in the software
    2. The users way of operating the system
    The goal of reliability testing is to check whether the software meets the requirements of client’s reliability. There are various levels of performing this testing. Most complex system will be tested at unit, assembly and subsystem levels.
    Factors to measure the reliability software:
    1. Test – retest reliability
    2. Parallel form of reliability
    3. Inter-related reliability
    Reliability tells us how consistently the test scores measure something whereas the validity tells us whether the test scores are measuring the right things for a particular use of test.

  6. Reliability characteristic of a software is defined as a failure free software for operations for a period of time in a particular environment. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives a stable outcome or results for the steps performed consistently.
    Things that are influencing software reliability are:
    1. The number of bugs or mistakes present in the software.
    2. The user’s way of operating the system.
    3. Reliability and validity are the two important features that a any test scores can have, they are always mentioned together but often give two different kinds of information.
    Factors to measure the reliability software:
    1. Test – retest reliability
    2. Parallel form of reliability
    3. Inter-related reliability
    Reliability tells us how consistently the test scores measure something whereas the validity tells us whether the test scores are measuring the right things for a particular use of test.

  7. Reliability characteristic of a software is defined as a failure free software for operations for a period of time in a particular environment. Reliability testing is performed to make sure that the software is reliable and satisfies the requirements for which it is made . It should give a stable outcome or results when the steps are performed consistently.

    Things that influence software reliability are:

    1)The number of bugs or mistakes present in the software.
    2)The user’s way of operating the system.

    Reliability testing helps to identify many problems while designing the software and also verifies the functionality.
    Factors to measure the reliability software:
    1)Test – retest reliability
    2)Parallel form of reliability
    3)Inter-related reliability

    Reliability and validity are the two important features that any test scores can have, though they are always mentioned together ,they give two different kinds of information.

    Reliability tells us how consistently the test scores measure something whereas the validity tells us whether the test scores are measuring the right things for a particular use of test.

  8. Reliability characteristic of a software is defined as a failure free software for operations for a period of time in a particular environment. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives a stable outcome or results for the steps performed consistently.

    Things that are influencing software reliability are:

    The number of bugs or mistakes present in the software.
    The user’s way of operating the system.
    Factors to measure the reliability software:
    Test – retest reliability:
    Parallel form of reliability:
    Inter-related reliability:

  9. Reliability testing is performed to make sure that the software is reliable and satisfies the purpose of its development. It gives stable outcome or results for the steps performed consistently.
    these days the is high dependency from customers in terms of accuracy hence it should render fault free operations
    Different factors to measure the reliability :
    1. Test- Retest reliability- testing functionality twice at different times
    2. Parallel form of Reliability – many testers will test in same time and check results in parallel
    3. Inter-related Reliability – reliability and validity are both important. reliability means consistency of the results and validity means measuring the right parameters of the test

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