Assignment 6 Pg 305 2. What is a data flow diagram? Why do systems analysts use data flow diagrams? Answers: A picture of the movement of data between external entities and the processes and data stores within a system. Systems analysts use DFDs to help in the analysis phase by accomplishing the following three things: 1. Requirements Determination 2. Requirements Structuring 3. Alternative Generation and Selection 3. Explain the rules for drawing good data flow diagrams. Answers: Process: A. No process
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Figure 1.0: Entity Relationship Diagram of Generic Academic Performance Monitoring System Figure 2.0: Context Diagram of Generic Academic Performance Monitoring System The figure 2.0 represents the two (2) users of the Generic Academic Performance Monitoring System namely the Administrator and the Professor. The Administrator entity shows the capability to access the system; manage account by modifying account’s profile; managing member’s account such as creating new user profile and updating
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DATA FLOW DIAGRAM Group#7 Nugao Oserin Obongen The Data Flow Diagram (DFD) • a graphical representation of the flow of data through an information system. It enables you to represent the processes in your information system from the viewpoint of data. The DFD lets you visualize how the system operates‚ what the system accomplishes and how it will be implemented‚ when it is refined with further specification. • Data flow diagrams are used by systems analysts to design information-processing systems
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Narrative Flow of the Current System a. Flow of Data Figure 1 shows the data flow diagram of the current system where do the Research data on Research Development and Extension come from. First‚ the data will come from the Researcher then they will give it to their adviser‚ next to the Department Coordinator‚ Research Chairman‚ Campus Dean‚ Campus Administrator then it will be sent to Research Development and Extension Office on Capiz State University Main Campus. 1.0 Adviser 2.0 Department
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Circular Flow of Economic Activity The circular flow of economic activity is a model showing the basic economic relationships within a marketeconomy. It illustrates the balance between injections and leakages in our economy. Half of the model includes injections‚ and half of the model includes leakages. The circular flow model shows where money goes and what it’s exchanged for. The model includes households‚ businesses and governments. We also have the banking system that facilitates the exchange
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Fluid Mechanics Flow Past a Circular Cylinder The behaviour of flow around and past bodies that are circular in the crosssection is very important‚ mainly because there are so many matching scenarios out there. Golf balls‚ over head cables and underwater supports are just a few examples of circular cross-sections and how studying flow in this case is important. Let us take golf balls for example‚ they have been engineered in such a way from them being perfectly round‚ to having small indents
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The Circular Flow of Income and Expenditure The circular flow of income and expenditure refers to the process whereby the national income and expenditure of an economy flow in a circular manner continuously through time. The various components of national income and expenditure such as saving‚ investment‚ taxation‚ government expenditure‚ exports‚ imports‚ etc are shown on diagrams in the form of currents and cross-currents in such a manner that national income equals national expenditure
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Concepts Behind the Circular Flow Model Economics is a multifaceted subject that takes years of study and research to fully grasp. Because it is also a very important subject to everyone‚ it is important that we all understand it. However‚ not all of us are economists or have the time to devote to such a study. This is where models come in. Economists take the key points‚ main concepts‚ and/or statistical data and simplify them for the rest of us. One such economic model is the Circular Flow Model. The movement
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Free Data Flow Diagrams Tutorial DFD Tutorial Data Flow Diagrams - Introduction Data flow diagrams can be used to provide a clear representation of any business function. The technique starts with an overall picture of the business and continues by analyzing each of the functional areas of interest. This analysis can be carried out to precisely the level of detail required. The technique exploits a method called top-down expansion to conduct the analysis in a targeted way. [pic] The
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Draw ENTITY RELATIONSHIP DIAGRAM (ERD) for the following requirement: 1. Students take courses in a college 2. Customers have accounts in a bank 3. People own vehicles 4. Employees manage projects 5. Machines are made up of parts 6. A college offers several courses. Attributes of the course include course code‚ name and credits. Each course may have zero or more subjects 7. Hotel (HotelNo‚ Name‚ Add‚ TelNo) Room (RoomNo‚ HotelNo‚ Type‚ Price) Booking (HotelNo
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