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

Explain different recording modes, Explain different recording modes. T...

Explain different recording modes. There are two type of recording modes: context sensitive and analog. - Context Sensitive - identifies GUI objects and records operations

What are the types of software system requirements, What are the types of S...

What are the types of Software system requirements? Functional requirements: Services the system should give. Non-functional requirements: Constraints on the services.

Define the stress testing, Define the Stress testing: - It checks the r...

Define the Stress testing: - It checks the robustness of application. - It verifies that application consistently gives satisfactory performance under unfavorable and extrem

How can we re-engineering of any product, How can we re-engineering of any ...

How can we re-engineering of any product One additional difficulty in adopting this approach is large investment which exists in software system maintenance. It requires additi

Calculate the values of software, Q. For the program given below, calculate...

Q. For the program given below, calculate the values of software science measures like ? , N, V, E and λ . int. sort (int x[], int n) { int i, j, save, im1; /

Explain performance testing, Performance testing signifies loads, volumes, ...

Performance testing signifies loads, volumes, and response times, as described by requirements. Although performance testing is a part of system testing, it can be regarded as a ex

Explain productivity and difficulty, Productivity and difficulty Produ...

Productivity and difficulty Productivity refers to metrics and measures of output from production processes, per unit of input. Productivity P may be conceived of as a metric

Explain rad model, RAD Model Rapid Application Development Model is ...

RAD Model Rapid Application Development Model is the method of incremental model. Achieves the high speed development using component based construction. Phases

Data dictionary , data dictionary of online banking system

data dictionary of online banking system

What is a user guide, The "user guide" is the similar as the user manual. T...

The "user guide" is the similar as the user manual. The user guide is a document that shows information essential to employ a system or component to get the desired results. Typica

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