Define software reliability, Software Engineering

Assignment Help:

Define software reliability. What is the difference between hardware & software reliability?

Ans: Software reliability is the possibility that software will provide failure-free operation in a fixed environment for a fixed interval of time. Probability of failure is the possibility that the software will fail on the next input selected. Software reliability is usually measured per some unit of time whereas probability of failure is usually time independent. These two measures are able to be easily related if you know the frequency with which inputs are executed per unit of time. Mean-time-to-failure is an average interval of time between failures this is as well sometimes referred to as Mean-time-before-failure.

Software reliability is liable to change repeatedly during test periods. While hardware reliability may perhaps change during certain periods such as initial burn in or the end of useful life however it has a much greater tendency then software value.

Hardware faults aren't physical faults whereas software faults are design faults that are harder to classify, visualise, detect and correct. In reality the division among hardware and software reliability is somewhat artificial. Both perhaps defined in the same way therefore one may combine hardware and software reliability to get system reliability. The basis of failure in hardware has generally being physically deterioration.


Related Discussions:- Define software reliability

State the defined level of maturity model, Level 3 (Defined) The org...

Level 3 (Defined) The organisation satisfies all the requirements of level-2. Atthis maturity level, the softwaredevelopmentprocesses arewell defined, managed and documented

Describe bottom-up and top-down approaches, How do you develop a test plan ...

How do you develop a test plan and schedule? Describe bottom-up and top-down approaches. A test plan is contract among the testers and the project team explaining the role of t

Database management systems, Database Management Systems: These are es...

Database Management Systems: These are essentially programming frameworks, and can offer good storage and retrieval systems. They are mainly intended for programmers to intera

Enumerate the evolution of software, Enumerate the evolution of software ...

Enumerate the evolution of software The below Table summarises evolution of software: 1960s Infancy Machine Code 1970s Project Years

Project, How to create A system to incorporate uploading and display of dif...

How to create A system to incorporate uploading and display of different media types on the web e.g. audio, video, graphics, text, power point files, excel files, Word files on the

Diffrence between functional testing and structural testing, Q. Differentia...

Q. Differentiate between functional testing and structural testing. Ans: Functional testing signifies behavioural testing or Black box testing. In this techniques the teste

Distribution of the package, Distribution of the Package: In the last ...

Distribution of the Package: In the last 12 years of its existence CDS/ISIS software has become one of the most popular packages of its kind. It is estimated that there are ab

How to compute the cyclomatic complexity, How to compute the cyclomatic com...

How to compute the cyclomatic complexity? The cyclomatic complexity can be computed by any one of the following ways. 1. The numbers of regions of the flow graph correspond

What are the advantages and disadvantages of big-bang, What are the advanta...

What are the advantages and disadvantages of big-bang? Advantages: This approach is easy. Disadvantages: It is difficult to debug.It is not easy to isolate errors whereas te

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd