PPT-Data Flow Diagrams

331 This presentation covers What is a Data Flow Diagram Why are they used How to draw them Definition A data flow diagram is used for the visualization of data processing It illustrates the processes data stores external entities data flows in a business or other system and the relationships between these things. 1 What is the main merit of DFD The main merit of DFD is that it provi des an overview of what data flows in a system what transformations are done on the data what files are used and where results flow 52 What is the role of DFD as a documentation a Le Vie Jr Data flow diagrams DFDs reveal relationships among and between the various components in a program or system DFDs are an important technique for modeling a systems highlevel detail by showing how input data is transformed to output results Hurricane Loss Model. . v6.1. Computer Science. February 2-4, 2015. 1. Dr. . Shu-Ching. Chen. School of Computing and Information Sciences. Florida International University. C-3 Model Architecture and Component . Chapter 4. Requirements Specification. & Documentation. start. Chap. 2:. Elicitation. techniques. Chap. 3:. Evaluation. techniques. . alternative options. agreed. requirements. documented requirements. System. s. Analysis. Structured analysis. Karolina . Muszyńska. Based partly on: http://www.csun.edu/~dn58412/IS431/IS431_SP13.html. Model-driven Analysis. Structured analysis. Information engineering. The controlled assessment is worth 25% of the GCSE. The project has three stages;. Planning. Collecting, processing and representing data. Interpreting and evaluating data. Formulate a hypothesis. Plan a strategy for testing you’re your hypothesis. Objectives. Understand the purpose of use-case diagrams and how to create them. Understand the purpose of activity diagrams and how to create them. OOP Review. Object-oriented development approaches are. MARYAM ALDOSSRAAY. 200700562. DEMAH AL-SHAMMASI. 200800222. Out Line . History of sketching . How to draw bubble diagram. Artist . History of . Sketching . Sketching: . is . a rapidly executed freehand . Value Stream Maps, Oh My!. Bonnie Stone, MBB, PMP. bstone@minitab.com. Agenda. What are Process Maps?. Benefits . Types. Which Map to Use?. Reading a Process Map. Future State. Toto, we’re not in Kansas anymore!. Focus is the . logical . view of the system, not the physical. “What” the system is to accomplish, not how. Tools:. data flow diagrams. data dictionary. process specification. entity-relationship diagrams. 2. Modeling Business Processes with Data Flow. A common business process modeling technique utilizes. . Data Flow Diagrams. (DFDs). The emphasis in data flow modeling is on modeling function (i.e. the process that enables the flow of data). A data flow diagram (DFD) is a graphical representation of the movement of data between external entities, processes and data stores within a system. . Simply put, DFD’s show . how data moves through an information . A data flow diagram (DFD) is a graphical representation of the movement of data between external entities, processes and data stores within a system. . Simply put, DFD’s show . how data moves through an information . Technology. Systems Analysis & Design . IT 2405. Nisansala. . Dharmasena. . Bertholameuse. BSc Special (Hons) in IT,PGD in IT, MSc in IT,. PGD in IR, Dip in Journalism, M.Phil. in Computer Science (Reading).