TYPES OF DATA FLOW DIAGRAM: LOGICAL DFD PHYSICAL DFD Data Flow Diagrams (DFDs) are categorized as either logical or physical. A logical DFD focuses on the business and how the business operates. It describes the business events that take place and the data required and produced by each event. On the other hand‚ a physical DFD shows how the system will be implemented. Design Feature Logical Physical What the model depicts How the business operates How the system will be implemented
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System Analysis and Design/ Tools for systems analysts Learning Objectives Learning Objectives What are Data Flow Diagrams (DFDs)? Why they are useful? How are they developed? How to level DFDs? Good style conventions in developing DFDs Difference between Logical and Physical DFDs Tools available to draw DFDs V. Rajaraman/IISc. Bangalore //V1/June 04/1 System Analysis and Design/ Tools for systems analysts Motivation Motivation WHY DFD ? Provides an overview of
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Tutorial Week 7 - Class and Entity-Relationship Diagrams 1 Class Diagrams and Entity Relationship Diagrams (ERD) Class diagrams and ERDs both model the structure of a system. Class diagrams represent the dynamic aspects of a system: both the structural and behavioural features. ERDs‚ depicting only structural features provide a static view of the system. 2 Class Diagrams 2.1 Elements of a class diagram: 2.1.1 class A class is a general concept (represented as a square box). A class defines
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Gas Station Project * Main * My Books * C/C++ Programs * Java Programs * Perl/PHP/Ruby Programs * Team Projects * Various Projects Program Description This was a semester-long project from my software engineering class at UNO. The goal of this project was to create a gas station management software package using the classic waterfall development lifecycle. Some of the requirements that needed to be met were: the ability to control gas pumps‚ keep track of in-store
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Create an activity diagram for the following system. Of-the-Month Club (OTMC) is an innovative young firm that sells memberships to people who have an interest in certain products. People pay membership fees for one year and each month receive a product by mail. For example‚ OTMC has a coffee-of-the-month club that sends members one pound of special coffee each month. OTMC currently has six memberships (coffee‚ wine‚ beer‚ cigars‚ flowers‚ and computer games)‚ each of which costs a different amount
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The City Shaped; The City as Diagram In the Tired chapter‚ “The City as Diagram”‚ he explains that the design intent that determines the eventual form of certain cities. With the contemporary Eco village of Arcosanti and the Medieval period Palmanova in Italy‚ he contrasts two distinct forms‚ tracing their diagrammatic evolution. The diagram of the two cities is very specific‚ addressing their intent; responding to the landscape the former and to the militaristic needs and ideas in the latter
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Set Operations and Venn Diagrams " Please respond to the following: QUES: Create a story problem that demonstrates how a Venn diagram could be used to illustrate combined operation with sets. ANS: Use a Venn diagram to illustrate the following scenario: There are 40 people in a drum corp. Of the 40 people‚ 20 play the snare drum; 10 play the trumpet; 5 plays the cymbals. There are 5 people that play both the snare drum and cymbals; and 3 play all three instruments. How many people don’t play
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Use case diagram A use case diagram at its simplest is a representation of a user’s interaction with the system that shows the relationship between the user and the different use cases in which the user is involved. A use case diagram can identify the different types of users of a system. The different use cases and will often be accompanied by other types of diagrams as well. Figure 5.2: Use case Diagram 5.3 Use Case Analysis 5.3.1 Activity Diagram The following activity diagram represents
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would be used to develop the system because of time constraints in the development schedule. RAD is a linear sequential software development process model that emphasized on extremely short development cycle using a component-based construction approach. If the requirements are well understood and defined‚ and the project scope is constraint‚ the RAD process will enable a development team to create a fully functional system with in very short time period. RAD model has the following phases:
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(a) Draw the circuit diagram of capacitive tap and derive the equation for 07 transfer impedance. (b) Explain Double-conversion superhetrodyne receiver using block diagram. OR (b) Explain Automatic Gain Control using necessary circuit diagram. Q.3 Q.3 07 07 (a) With the help of neat diagram and waveform explain the operation of 07 envelop detector. (b) Explain the indirect method of FM generation. (Armstrong method). 07 OR (a) Draw the circuit diagram of ring modulator using
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