Discuss in details about functional modeling, Software Engineering

Assignment Help:

Discuss in details about Functional Modeling.

  • This model describes the computations that take part within a system.
  • This model is helpful when the conversion from the inputs to outputs is complex.
  • The functional model of a system can be shown by a data Flow Diagram (DFD).

Data Flow Diagrams/Data Flow Graph/Bubble chart

  • A DFD is a graphical diagram that depicts the information flow and the change that are applied when the data shift from input to output.
  • Level 0 DFD also known as fundamental system model or context model which describes the total software act as a single bubble with input and output data indicated by incoming and outgoing arrows.
  • Level 1 DFD contains 5 or 6 bubbles. Every bubble can be refined at Layers to depict more details.

Extensions to Real Time Systems

  • Ward and Meller extensions
  • Hatley and Pirbhai extension.

 


Related Discussions:- Discuss in details about functional modeling

What are task regions in the spiral model, What are task regions in the Spi...

What are task regions in the Spiral model. Customer communication - In this region it is recommended to establish customer communication. Planning - All planning doings are

What is system, A set of people, machines, and methods prepared to accompli...

A set of people, machines, and methods prepared to accomplish a set of specified functions.

What is branch coverage, What is Branch coverage? Ans) Test coverage cri...

What is Branch coverage? Ans) Test coverage criteria which needs that for each decision point each possible branch be implemented at least once. Syn: decision coverage. Contrast

Discuss about throw-away prototyping, Discuss about Throw-away prototyping ...

Discuss about Throw-away prototyping Objective: The principal aims of this model is to validate or to gain the system requirements. It is developed to minimise requi

What are interrupts, What are interrupts In a microprocessor system, th...

What are interrupts In a microprocessor system, there are three main types of interrupt that cause a break in the normal implementing of a program

What is fault, A manifestation of an error in software. A fault, if encount...

A manifestation of an error in software. A fault, if encountered, might cause a failure.

Explain throw-away prototyping and evolutionary prototyping, Q. Explain thr...

Q. Explain throw-away prototyping and evolutionary prototyping. Discuss the differences between the two. Ans Throw-Away Prototyping as well called close ended prototyping .

Functional requirement for a library management system, Write down the func...

Write down the functional requirement for a Library management system. The user should capable to search either all of the primary set of databases or select a subset of dat

What are the causes behind to perform white box testing, What are the cause...

What are the causes behind to perform white box testing? There are three main reasons behind performing the white box testing. 1. Programmers may have some incorrect assumpt

What is a technical analyst, What is A Technical Analyst? Ans) Technical...

What is A Technical Analyst? Ans) Technical Analysts perform test assessments and validate system/functional test needs. Depending on the project, single person might wear more

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