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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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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Pher Pher A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system‚ modeling its process aspects. Often they are a preliminary step used to create an overview of the system which can later be elaborated.[2] DFDs can also be used for the visualization of data processing (structured design). A DFD shows what kinds of data will be input to and output from the system‚ where the data will come from and go to‚ and where the data will be stored. It
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EXISTING POINT OF SALES BLOCK DIAGRAM PACKAGING OF ITEMS GENERATING RECEIPT (MANUALLY) COMPUTING OF TOTAL PRICE SEARCHING OF ITEM ORDER OF ITEM CONTEXT DIAGRAM ORDER OF ITEM SEARCHING OF ITEM COMPUTING THE TOTAL PRICE GENERATING RECEIPT (MANUALLY) PACKAGING OF ITEMS CUSTOMER PHARMACIST FIRST LEVEL DATA FLOW DIAGRAM 1 PLACE AN ORDER 2 SEARCHING OF ITEM PHARMACIST PACKAGING OF ITEMS CUSTOMER ITEM NAME ORDERED
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List of Tables vii List of Figures viii CHAPTER 1 CURRENT SYSTEM A. Company Background 1. History of the Company 2. Company Products / Service and Clients 3. Organizational Charts / Divisions and Departments 4. Locale of the Study (with Map) B. Overview of the Current System C. Context Diagram of the Current System D. Data Flow Diagram of the Current System E. User Overview of the Current System F. Analysis of the Current System G. Operational Definition of Terms CHAPTER
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The procedure for producing a data flow diagram • Identify and list external entities providing inputs/receiving outputs from system; • Identify and list inputs from/outputs to external entities; • Draw a context DFD Defines the scope and boundary for the system and project 1. Think of the system as a container (black box) 2. Ignore the inner workings of the container 3. Ask end-users for the events the system must respond to 4. For each event
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Service Request SR-rm-022‚ Part One Introduction Hugh McCauley‚ COO of Riordan Manufacturing has submitted service request SR-rm-022. The service request is to integrate existing variety of human resource (HR) tools into a single integrated application (Apollo Group‚ Inc. 2011). The new system will provide the organization with a more sophisticated‚ state-of-the art‚ information systems technology than what they currently have to better assist the HR department. Before the approval of the project
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3.9.2 Data Flow Diagram (DFD) DFD or Data Flow Diagram is a graphical representation that showing the flow of data of information system. It also shows the structured design of the program to replace the flowchart or pseudo code as program tool. Basically DFD can be divided into four components such as entity or external entity‚ process‚ data store and data flow. DFD start with an overview of the system that needs to be designed. This DFD known as context DFD that contain the entity and the process
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SR-rm-013: Network‚ Data‚ and Web Security CMGT/441 June 18‚ 2012 Abstract Riordan Manufacturing conducts an information systems security review over IT security issues that exist in different plants to prepare for an upcoming audit in accordance to the Sarbanes-Oxley Act. Several elements of the organization ’s information systems require revisions and updates to optimize physical and network security‚ data security‚ and Web security. SR-rm-013: Network‚ Data‚ and Web Security
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Introduction The McBride Financial Website offers customers a service in which to purchase residential and recreational property loans. McBride Financial website offers credit reporting‚ home inspection‚ appraisal‚ and mortgage loan services for one low price for $1‚500.00. Although this information is listed on the current McBride Financial website‚ Team A has been commissioned by service request SR-mf-001 to make improvements to the website‚ to offer online customers easier access‚ better educational
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