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

Define brooks law, Define Brooks law. Software was delivered late, was ...

Define Brooks law. Software was delivered late, was not reliable, cost various times the original estimates and often exhibited poor performance characteristics.

Types of software organization, How many types of software organization? Ex...

How many types of software organization? Explain each organization style with a suitable example? What are the factors that influence the group? Write short notes on the stak

Explain network switching subsystem in gsm, Question: (a) (i) What are...

Question: (a) (i) What are the main components of the Network Switching Subsystem in GSM? (ii) What are the main functions of the Network Switching Subsystem? (b) What

What is the meaning of cardinality in data modelling, What is the meaning o...

What is the meaning of cardinality in data modelling? Cardinality in data modelling, cardinality specifies how the of occurrences of one object is linked to the number of occur

What do you understand by the term integrity, Question: (a) What do yo...

Question: (a) What do you understand by the term "integrity"? (b) Which type of attack denies authorized users access to network resources? (c) You have discovered tha

Define data dictionary, Define Data Dictionary The data dictionary can ...

Define Data Dictionary The data dictionary can be explained as an organized collection of all the data elements of the system with precise and rigorous definitions so that user

What is code restructuring, Q. What is Code Restructuring? Code Restru...

Q. What is Code Restructuring? Code Restructuring : It is performed to acquiesce a design that produces the same function but with higher quality than the original program. Ge

Advantages of re-engineering, Advantages of Re-Engineering:- 1)  Reduce...

Advantages of Re-Engineering:- 1)  Reduced risk - there is a huge risk in new software development. There might be development problems, staffing problems and specification pro

Paradigm, which paradigm tend to correspond with top down and bottom up des...

which paradigm tend to correspond with top down and bottom up design

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