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

What are the umbrella activities of a software process, What are the umbrel...

What are the umbrella activities of a software process? Software project tracking and control. Risk management. Formal Technical Reviews. Software Quality Assurance.

What is detailed COCOMO model, Q. What is Detailed COCOMO model ? The d...

Q. What is Detailed COCOMO model ? The detailed COCOMO model is able to estimate the staffing cost and duration of each of the subsystem, development phases and modules. It per

Determine the latest trend in software engineering, Determine the Latest tr...

Determine the Latest trend in software engineering Latest trend in software engineering includes the concepts of software reusability, reliability, scalabilityetc. More and mo

Activity and use case diagram, The Application You should develop your p...

The Application You should develop your program using incremental development. Develop your program a little bit at a time and keep testing it. Save a working version before mak

Define the optimising level of maturity model, Level 5 (Optimising) O...

Level 5 (Optimising) Organisation satisfies all the requirements of level-4. This is final level. Organisation at this maturity level is considered almost perfect. At this st

Explain virtual memory, Explain virtual memory? Ans) Virtual memory tell...

Explain virtual memory? Ans) Virtual memory tells to virtual storage. In virtual storage, portions of a user's program and data are placed in auxiliary storage, and the operatin

What is system testing, What is System Testing System Testing : This t...

What is System Testing System Testing : This testing focuses on validating the product with respect to software specification Document. Methods like function testing (using Bl

Define graph matrix and connection matrix, Q. Define graph matrix and conne...

Q. Define graph matrix and connection matrix. Ans: Graph matrix: A graph matrix is a square matrix whose size that is a number of rows and columns is equal to the number of n

Explain hybrid design, Hybrid design: Pure top-down or pure bottom up appr...

Hybrid design: Pure top-down or pure bottom up approaches are often not practical thus hybrid approach which combines  the above two approaches is often used.

Explain token count, Token count: -  A program is considered to be series o...

Token count: -  A program is considered to be series of tokens and if we count the number of tokens, some interesting results might be emerge. Tokens are classified as either opera

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