these modules are that interconnected. Context Flow Diagram (CFD): A Context Flow Diagram is a top level (also known as level 0) data flow diagram. It only contains one process node (process 0) that generalizes the function of the entire system in relationship to external entities. A Context Flow Diagram is a diagram that shows the inputs and output of a system. It shows all the external entities with the system and the data flows between these entities and the system. Order ‚
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✓ The system must have a time reminder for every train arrival and departure. B. Input ✓ Employees must enter their username and password for the logging in process. ✓ The ticket clerk must input the necessary data including the route of the passenger‚ quantity of their purchase and the time of their travel during the transaction. C. Process ✓ D. Performance ✓ The system must be operational 7 days a week
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Assignment # 1 1 Cs403 Database Management System CS403 Assignment # 1 Data Flow Diagrams (DFDS) Assigned date: 10-10-2006 Due date: 15-10-2006 The Assignment: • Draw Context (Level 0) DFD • Draw Detailed Level DFD (i.e. level 1 & Level 2 ) of the following system. 30 Abc & co. is a Pharmaceutical company which sales life saving medicines. You have to draw 0‚ 1& 2 level DFDS of sales and purchase system of above company. Main entities of system are Customer‚ supplier‚ product‚ stock
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| | |Answer: False Difficulty: Medium Reference: p. 515 | | |All business processes are composed of a flow of goods and services. | | | | | |Answer:
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Questions DQ4-1 "Data flow diagrams and flowcharts provide redundant pictures of an information system. We don’t need both." Discuss. ANS. Logical data flow diagrams (DFDs) present only the logical elements of an information system. By excluding the physical elements‚ the logical DFD allows us to concentrate on what a system is doing without being distracted by how the f Physical DFDs present the physical elements of an information system. They concentrate on who is acting on the data flowing through
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1. What is documentation? Why do accountants need to understand documentation? ------------------------------------------------- Documentation refers to a set of documents and models‚ such as narratives‚ data flow models‚ flowcharts‚ and other written materials that explain a how a system works. Documentation tools are important‚ because: -At minimum‚ you must be able to read documentation to determine how the system works. -You may be required to evaluate internal control systems documentation
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|Figure 2.1 Context Diagram | |9 |Figure 2.2 Parent Diagram | |12 |Figure 2.3 Child diagram‚ process 1 | |14 |Figure 2.4 Child diagram‚ process 2
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Employees payroll system; 3.4 Charts‚ Tables and Diagrams HIPO (Hierarchical Input Process Output) diagram reveals the flow of the process of the system in which it shows the functions of each module and give the user an idea. Data Flow Diagram reveals the relationships among and between the various components in a program or system. Entity Relationship Diagram illustrates the relationships between entities in a database. Context Diagram provides a visual model of the interactions between
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performed by the system. Entities represent all the information sources of the system. We represent the entities and the processes in the data flow diagrams‚ DFD. While designing the DFD’s we increase the level of detail with each level. At each level the process divides into sub-processes until indivisible sub-processes are reached. Here is an example. Data Flow Diagram 0: Here we represent the information system at Riordon Manufacturing Inc. The information system comprises of : – Employees
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and specific objectives of the course. Course Activities 1. Lecture – There are specific concepts that must be learned first by the students before they undergo the actual systems analysis and systems design. Topics include software process models‚ data modelling‚ database design‚ and quality assurance. These are outlined on the syllabus. 2. Grouping – The students are grouped according to their strengths and weaknesses. The instructor shall be the one to group the students. This setup follows the
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