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 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

Explain iterative enhancement model, Q. Explain Iterative Enhancement model...

Q. Explain Iterative Enhancement model? This model incorporates modification in the software based on the analysis of the existing system. As well the complete documentation of

Evaluate the total costs for johns project, Question: (a) Show two mai...

Question: (a) Show two main approaches to identify risk in a project. (b) John finds that IOE recovers some overheads as oncosts on direct staff costs although others are

Explain abstraction, Abstraction :- Abstraction allows one to concentrate o...

Abstraction :- Abstraction allows one to concentrate on a problem at some level of generalization without regard to irrelevant low level details; use of abstraction also allows one

Memory locations and registers pc-ir-mar, Assume 64 different op codes and ...

Assume 64 different op codes and 19-bit instruction word in a computer system. Two bits in the instruction are reserved to indicate the addressing mode.    a. Draw a box style ske

Describe phases of unified software development life cycle, Question: (...

Question: (a) With the aid of a labeled diagram, briefly describe the phases of the "Unified software development life cycle" and state the output of each phase. (b) Describ

What is upwardly compatible software, "Upwardly compatible software" is sof...

"Upwardly compatible software" is software that is compatible with a later or more difficult version of itself. For example, an upwardly compatible software is able to occur files

How to perform risk analysis during software testing, Describe how to perfo...

Describe how to perform Risk Analysis during software testing. Whereas a test plan is being formed, risks involved in testing the product are to be taken into consideration al

What are quality reviews, What are Quality reviews? This is the princip...

What are Quality reviews? This is the principal method of validating the quality of a process or of a product. A group examines part or all of a process or system and its do

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