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

List the process maturity levels in seis cmm, List the process maturity lev...

List the process maturity levels in SEIs CMM. Level 1: Initial - Few processes are explained and individual efforts are taken. Level 2: Repeatable - To track cost schedul

What is process and procedures, Processes and procedures make sure the corr...

Processes and procedures make sure the correct steps are being implemented to facilitate a successful finished off a task. They also make sure a process is repeatable.

What is the aim of testing, In well-run projects, the mission of the test t...

In well-run projects, the mission of the test team is not merely to perform testing, but to help decrease the risk of product failure. Testers look for manifest problems in the pro

Define capability maturity model, CMM is a strategy for enhancing the softw...

CMM is a strategy for enhancing the software process irrespective of the actual life cycle model utilized. SEI (Software Engineering Institute) of Carnegie-Mellon University develo

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 about rapid prototyping techniques, Explain about rapid prototyping...

Explain about rapid prototyping techniques. Executable specification languages. Used to living the system specification. It is expressed in a formal, mathematical la

What does it mean by business process engineering tools, What does it mean ...

What does it mean by business process engineering tools ?

What are the testing principles of software testing, What are the testing p...

What are the testing principles the software engineer must apply whereas performing the software testing? i. All tests should be traceable to customer requirements. ii. Test

What is ripple effect, What is ripple effect?       The ripple effect i...

What is ripple effect?       The ripple effect is a term used to describe a situation where, like the ever expanding ripples across water when an object is dropped into it, an

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