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

Disadvantage of software package, Disadvantage of Software package: Th...

Disadvantage of Software package: There are some disadvantages which need to be looked into. They are: i) A commercial software package will have a number of built-in

Explain throw-away prototyping, Throw-away prototyping Objective: ...

Throw-away prototyping Objective: The principal objective of this model is to validate or to derive the system requirements. It is developed to reduce requir

Explain the iterative model, Explain the Iterative Model Every release ...

Explain the Iterative Model Every release of Iterative Model is developed in a specific, fixed time period known as iteration. Each iteration focuses on a certain set of requir

Requirement analysis, Objectives of Requirement Analysis

Objectives of Requirement Analysis

Explain the bottom-up approach, What is bottom-up approach? System deve...

What is bottom-up approach? System developed beginning from detailed modules. Testing begins from the detailed modules and proceeds up to the higher levels of hierarchy.

Database, explain why older data models are being replaced by new data mo...

explain why older data models are being replaced by new data models.

Transaction mapping, how transaction mapping is done.??clear me with a brie...

how transaction mapping is done.??clear me with a brief example

What is delphi model, What is Delphi model? In Delphi method, a number ...

What is Delphi model? In Delphi method, a number of parameters to be considered based on as experts estimates. The group estimate is taken as on an average of the weighted

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

What does it mean by business process engineering tools ?

What is the use of architectural design, What is the use of Architectural d...

What is the use of Architectural design? The Architectural design explains the relationship among major structural elements of the software, the "design patterns" that can be u

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages