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

Draw a data flow diagram using srd technique, Consider a program that regis...

Consider a program that registers students for different programs. The students fill up a form and submit it. This is sent to the departments for confirmation. Once it is confirmed

What is branch coverage, What is Branch coverage? Ans) Test coverage cri...

What is Branch coverage? Ans) Test coverage criteria which needs that for each decision point each possible branch be implemented at least once. Syn: decision coverage. Contrast

Explain in detail about black box testing, Explain in detail about Black bo...

Explain in detail about Black box testing. Black box or behavioural testing focuses on the functional needs of the software. It is applied during the last phase of testin

State the cocomo model, What is COCOMO model? COCOMO stands for COnstru...

What is COCOMO model? COCOMO stands for COnstructive COst MOdel. It is used for cost Effort=a * KDLOCb Where a and b are two parameters of the model whose specific values

What is software requirement specification, Q. What is Software requirement...

Q. What is Software requirement Specification (SRS)? Why is it important? List the characteristic of a good quality SRS? Ans: (SRS) Software Requirement Specification Documen

Why srs also known as the blackbox specification of system, Why is SRS also...

Why is SRS also known as the blackbox specification of system ? Ans: SRS document is a contract among the development team and the customer.  Once the SRS document is accepted

What is ripple effect, Q. What is ripple effect? How does it affect the sta...

Q. What is ripple effect? How does it affect the stability of a program? Ans. The ripple effect is a term used to explain a situation where like the ever expanding ripples

Draw the context level dfd for the safe home software, Draw the Context lev...

Draw the Context level DFD for the Safe home Software. User commands Alarm type Telephone Number tone Sensor status Display Information

System analyst, Explain the role and functions of a Systems Analyst in the ...

Explain the role and functions of a Systems Analyst in the overall project development.

What are the various elements of data design, What are the various elements...

What are the various elements of data design? i. Data object - The data objects are identified and relationship between various data objects can be shown using ERD or data dict

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