Explain basic execution time model, Software Engineering

Assignment Help:

Q. Explain Basic Execution Time Model?

The model was developed by the J.D. MUSA in 1979(MUSA79) and is based on execution time. It is presumed that failures may occur according to a non-homogeneous Poisson Process (NHPP) Real world events may be described using Poisson processes. Instance of Poisson processes are

- A Number of telephone calls expected in a given period of time

- Expected figure of road accidents in a given period of time

- Expected figure of persons visiting in a shopping mall in a given period of time.

In this model the reduce in failure intensity as a function of the number of failures observed is constant and is given as:

288_Explain Basic Execution Time Model.png

Where Initial failure intensity at the start of execution.

V0 Number of failures experienced, if program is executed for Infinite time period μ Average as well expected number of failures experienced at a given point in time. These models imply a uniform operational profile. If every input class are selected equally often the various faults have an equal probability of manifesting themselves. The correction of whichever of those faults then contributes an equal decrease in the failure intensity. The negative sign publicized that there is a negative slope meaning thereby a decrementing trend in failure intensity.


Related Discussions:- Explain basic execution time model

How software metrics is beneficial for sfotware engineer, How software metr...

How software metrics is beneficial for sfotware engineer Using software metrics, software engineer measures software processes and requirements for that process. Software measu

What quality would you look for when hiring a test engineer, What qualities...

What qualities would you look for when hiring a test engineer? - Test to break attitude - Desire for quality and attention to details. - Tact and diplomacy when dealing w

State both verification and validation, Define Verification &Validation. ...

Define Verification &Validation. Verification : The set of actions that make sure software correctly implements a particular function. Validation : The set of actions that

Describe incremental model, Q. Describe incremental model? Define core prod...

Q. Describe incremental model? Define core product and detailed plan. Ans. The incremental model is proposed by D.L PARNAS. It is basically implemented by combining elements

What is waterfall model, Waterfall is a model of the software development p...

Waterfall is a model of the software development process in which the idea phase, requirements phase, design phase, execution phase, test phase, installation phase, and checkout ph

What is requirements definition description, What is Requirements Definitio...

What is Requirements Definition Description Output of requirements of engineering process is Requirements Definition Description (RDD). Requirements engineering can be defined

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

Difference between module coupling and module collection, Q. What is the di...

Q. What is the difference between module coupling and module collection? List different types of coupling and cohesion. Ans : Cohesion is the property of a single module as we

Define the system requirements, What is meant by System Requirements? ...

What is meant by System Requirements? Place the system services and constraints in detail. Serves as a link between the system purchaser & the system developer.

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